Bloc Voting in the United States Senate. - J. A. Hartigan (J. Classif., 2000)

Maximum entropy Gaussian approximations for the number of integer points and volumes of polytopes. - Alexander I. Barvinok; J. A. Hartigan (Adv. Appl. Math., 2010)

The number of graphs and a random graph with a given degree sequence. - Alexander I. Barvinok; J. A. Hartigan (Random Struct. Algorithms, 2013)