Jay Ulfelder

发表

J. Goldstone, T. Gurr, David L. Epstein, 2010 .

Jay Ulfelder, Michael B. Lustik, M. Lustik, 2007 .

Jay Ulfelder, Jay Ulfelder, 2012 .

Jay Ulfelder, Benjamin Valentino, Jay Ulfelder, 2008 .

Patrick T. Brandt, Jay Ulfelder, 2011 .

J. Goldstone, R. Bates, Jay Ulfelder, 2010 .

J. Goldstone, Jay Ulfelder, 2004 .