"Gravitational lensing statistics based on a large sample of highly luminous quasars"

Surdej, J., Claeskens, J.F., Crampton, D., Filippenko, A.V., Hutsemèkers, D., Magain, P., Pirenne, B., Vanderriest, C., Yee, H.K.C.: 1993, Astron. J. 105, 2064-2078.

"Search for gravitational lenses in a large sample of highly luminous quasars and statistical determination of cosmological parameters"

Claeskens, J.-F., Crampton, D., Filippenko, A.V., Hutsemékers, D., Magain, P., Pirenne, B., Surdej, J., Vanderriest, C., Yee, H.K.C.: 1993, in the proceedings of the 31^st Liège International Astrophysical Colloquium "Gravitational lenses in the Universe" (eds. J. Surdej, D. Fraipont-Caro, E. Gosset, S. Refsdal and M.Remy), pp. 263-265.

"Gravitational lensing statistics based on a large sample of highly luminous quasars observed with HST and ground-based telescopes"

Surdej, J., Claeskens, J.F., Crampton, D., Filippenko, A.V., Hutsemékers, D., Magain, P., Pirenne, B., Vanderriest, C., Yee, H.K.C.: 1992, in the proceedings of the HST Workshop

"Science with the Hubble Space Telescope", Baia Chia, Sardinia, Eds. P. Benvenuti and E. Schreier, 111-118.

"Gravitational lenses among highly luminous quasars: large optical surveys"

Claeskens, J.-F., Jaunsen, A., Surdej, J.: 1996, in the proceedings of IAU Symposium 173, "Gravitational Lensing'', Melbourne, July 1995, eds. C. Kochanek and J. Hewitt, pp. 13-20.

"Determination of the cosmological density of compact objects using gravitational lensing and the HST''

Claeskens, J.-F., Surdej, J.: 1996, in the proceedings of "Science with the HST-II'', Paris, eds. P. Benvenuti, F.D. Macchetto, E.J. Schreier, pp. 96-100.

"Gravitational Lensing in Quasar Samples''

Claeskens, J.-F., Surdej, J.: 2000, Astron. & Astrophys. Review, in press