A study of the analysis and control of the flow of air traffic: Part I. - Leonard J. Forys; Harry Heffes; Julian M. Holtzman; S. Horing; E. J. Messerli; Morton I. Schwartz; Josephine Abbott Stiles (Networks, 1971)

A study of the analysis and control of the flow of air traffic: Part II. - Leonard J. Forys; Harry Heffes; Julian M. Holtzman; S. Horing; E. J. Messerli; Morton I. Schwartz; Josephine Abbott Stiles (Networks, 1971)

A study of the analysis and control of the flow of air traffic: Part III. - Leonard J. Forys; Harry Heffes; Julian M. Holtzman; S. Horing; E. J. Messerli; Morton I. Schwartz; Josephine Abbott Stiles (Networks, 1971)

Analysis of trunk groups containing short-holding-time trunks. - Leonard J. Forys; E. J. Messerli (Bell Syst. Tech. J., 1975)