Expectation and variance of the volume covered by a large number of independent random sets A. J. Stam — 1984 Compositio Mathematica
Laws of large numbers for functions of random walks with positive drift A. J. Stam — 1968 Compositio Mathematica
Local central limit theorem for first entrance of a random walk into a half space A. J. Stam — 1971 Compositio Mathematica