The cluster mass function from early Sloan Digital Sky Survey data: Cosmological implications

Neta A. Bahcall, Feng Dong, Paul Bode, Rita Kim, James Annis, Timothy A. McKay, Sarah Hansen, Josh Schroeder, James Gunn, Jeremiah P. Ostriker, Marc Postman, Robert C. Nichol, Chris Miller, Tomotsugu Goto, Jon Brinkmann, Gillian R. Knapp, Don O. Lamb, Donald P. Schneider, Michael S. Vogeley, Donald G. York