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by Soifer, Alexander; Van Dalen, Dirk; Fernandez, James W.; et al.
by Soifer, Alexander
by Alexander Soifer
by Grünbaum, Branko; Soifer, Alexander; Johnson, Peter; et al.
by Erdös, Paul; Soifer, Alexander
by Soifer, Alexander; Grunbaum, Branko; Johnson, Peter D., Jr.