This set of references, to the best of my knowledge, is a complete list of all scientific sources in which the mass of one or more asteroids is determined. This does not include the dozen or so papers that talk about asteroid mass determination, but do not actually determine a mass. If I have missed a reference, please email it to me and I will add it to the list.
Bange, J. 1998, "An Estimation of the Mass of Asteroid 20 Massalia Derived from the Hipparcos Minor Planet Data", Astron. Astrophys., 340, L1-L4
Belton, M.J.S., Chapman, C.R, Thomas, P.C., Davies, M.E., Greenberg, R., Klassen, K., Byrnes, D., D'Amarlo, L., Synott, S., Johnson, T.V., McEwen, A., Merline, W.J., Davis, D.R., Petit, J-M., Storrs, A., Veverka, J., & Zellner, B. 1995, "Bulk Density of Asteroid 243 Ida from the Orbit of Its Satellite Dactyl," Nature, 374, 785-788
Carpino, M. & Knezevic, Z. 1996, "Asteroid Mass determination: (1) Ceres", in IAU Symposium 172: Dynamics Ephemerides, and Astrometry of the Solar System, S. Ferraz-Mello, B. Morando, & J-E. Arlot eds. (), 203
Carpino, M. & Knezevic, Z. 1996, "Determination of Asteroid Masses from Mutual Close Approaches", in Proceedings of the 1st Italian Meeting of Planetary Science, Bormio, Italy
Goffin, E. 1991, "The Orbit of 203 Pompeja and the Mass of Ceres," Astron. Astrophys., 249, 563-568
Hertz, H.G. 1966, "The Mass of Vesta", IAUC, No. 1983
Hertz, H.G. 1968, "Mass of Vesta", Science, 160, 299-300
Hilton, J.L. 1996, "The Mass of 15 Eunomia", Asteroids, Comets, Meteors 1996, (Elsevier Science: Oxford)
Hilton, J.L. 1997, "The Mass of Asteroid 15 Eunomia from Observations of 1313 Berna and 1284 Latvia", Astron. J., 114, 402-402
Hilton, J.L. 1998, "New asteroid Ephemerides for the Astronomical Almanac", Bull. Amer. Astron. Soc., 30, 1144
Hilton, J.L. 1997, "New Masses and Densities for 1 Ceres, 2 Pallas, and 4 Vesta", Bull. Amer. Astron. Soc., 29, 1318
Hilton, J.L. 1998, "Improved Asteroid Ephemerides for the Astronomical Almanac", Proceedings of the Fourth International Workshop on Positional Astronomy and Celestial Mechanics, A. Lopez Garcia, L.I. Yagudin, M.J. Martinez Uso, A.C. Barbero, E.I. Yagudina, & J.A. Morano eds., (Universitat de Valencia: Valencia, Spain), 281-288
Hilton, J.L. 1998, "U.S. Naval Observatory Ephemerides of the Largest Asteroids", An extended explanation on constructing ephemerides of 15 asteroids including new masses from 1 Ceres, 2 Pallas, and 4 Vesta in hypertext on the world wide web
Hilton, J.L. 1999, "U.S. Naval Observatory Ephemerides of the Largest Asteroids", Astron. J., 117, 1077-1086
Kuzmanoski, M. 1996, "A Method for Asteroid Mass Determination", in IAU Symposium 172: Dynamics Ephemerides, and Astrometry of the Solar System, S. Ferraz-Mello, B. Morando, & J.-E. Arlot eds. (), 203
Landgraff, W. 1984, "Mass of (1) Ceres", MPC, 8665
Landgraff, W. 1988, "The Mass of Ceres", Astron. Astrophys., 191, 161-166
Landgraff, W. 1992, "A Determination of the Mass of (704) Interamnia from Observations of (993) Moultona", IAU Symposium 152: Chaos, Resonances, and Collective Dynamical Phenomena in the Solar System, S. Ferraz-Mello ed., (Kluwer: Dordrecht), 179-182
Merline, W.J., Close, L.M., Dumas, C., Chapman, C.R., Roddier, F., Menard, F., Slater, D.C., Duvert, G., Shelton, C., & Morgan, T. 1999, Discovery of a Moon Orbiting 45 Eugenia, Nature, 401, 565-569
Merline, W.J., Stern, S.A., Binzel, R.P., Festou, M.C., Flynn, B.C., & Lebofsky, L.A. 1996, HST Imaging of 1 Ceres, Bull. American Astron. Soc., 28, 1025
Petit, J. -M., Durda, D. D., Greenberg, R., Hurford, T. A., & Geissler, P. E. 1997, "The Long-Term Dynamics of Dactyl's Orbit", Icarus, 139, 177-197
Scholl, H., Schmadel, L.D., & Roser, 1987, "The Mass of the Asteroid (10) Hygiea Derived from Observations of (829) Academia", Astron. Astrophys., 179, 311-316
Schubart, J. 1970, "The Mass of Ceres", IAUC, No. 2268
Schubart, J. 1971, "The Planetary Masses and the Orbits of the First Four Minor Planets", Celest. Mech., 4, 246-249
Schubart, J. 1971, "Asteroid Masses and Densities", in IAU Colloquium No. 12: Physical Studies of Minor Planets, T. Gehrels ed., (NASA SP-267: Washington, DC), 33-39
Schubart, J. 1974, "The Masses of the First Two Asteroids", Astron. Astrophys., 30, 289-292
Schubart, J. 1975, "The Mass of Pallas", Astron. Astrophys., 39, 147-148
Sitarski, G. & Todorovic-Juchniewicz, B. 1992, "Determination of Masses of Ceres and Vesta from Their Perturbations on Four Asteroids", Acta Astronomica, 45, 673-677
Sitarski, G. & Todorovic-Juchniewicz, B. 1995, "Determination of Mass of (1) Ceres from Perturbations on (203) Pompeja and (348)May", Acta Astronomica, 42, 139-144
Standish, E.M., & Hellings, R.W. 1989, "A Determination of the Masses of Ceres, Pallas, and Vesta from Their Perturbations upon the Orbit of Mars", Icarus, 80, 326-333
Viateau, B. & Rapaport, M. 1995, "the Orbit of (2) Pallas", Astron. Astrophys. Suppl. Ser., 111, 305-310
Viateau, B. & Rapaport, M. 1997, "The Bordeaux Meridian Observations of Asteroids. First Determination of the Mass of (11) Parthenope", Astron. Astrophys., 320, 652-658
Viateau, B. & Rapaport, M. 1998, "The Mass of (1) Ceres from Its Gravitational Perturbations on the Orbits of 9 Asteroids", Astron. Astrophys., 334, 729-735
Viateau, B. & Rapaport, M. 1998, "Improvement of the Orbits and the Mass of (1) Ceres", in Proceedings of the ESA Symposium "Hipparcos-Venice '97", 92-94
Williams, G.V. 1992, "The Mass of (1) Ceres from Perturbations on (348) May", in Asteroids, Comets, Meteors 1991, A.W. Harris & E. Bowell eds.,(Lunar and Planetary Institute: Houston, TX), 641-643
Yeomans, D. K., Barriot, J. -P., Dunham, D. W., Farquhar, R. W., Giorgini, J. D.; Helfrich, C. E., Konopliv, A. S., McAdams, J. V., Miller, J. K., Owen, W. M., Jr., Scheeres, D. J., Synnott, S. P., & Williams, B. G. 1998, "Estimating the Mass of Asteroid 253 Mathilde from Tracking Data During the NEAR Flyby", Science, 278, 2106
