Phillip Helbig
"Cosmological parameters and gravitational lensing statistics"
in Proceedings of the Seventeenth Texas Symposium on Relativistic Astrophysics and Cosmology (ADS: 1995NYASA.759.....B)
H. Böhringer, G. E. Morfill & J. E. Trümper (eds.)
Annals of the New York Academy of Sciences 759, 600–603 (1995)
ISBN 0-89766941-X (cloth)
ISBN 0-89766942-8 (paper)
doi:10.1111/j.1749-6632.1995.tb17617.x | ADS: 1995NYASA.759..600H | Google Scholar