%% -*-BibTeX-*- @Book{Groetschel1977b, author = "Martin Gr{\"o}tschel", title = "Polyedrische Charakterisierungen kombinatorischer Optimierungsprobleme", chapter = "4", volume = "36", publisher = "Verlag Anton Hain", address = "Meisenheim am Glan", year = "1977", ISBN = "3-445-01537-6", series = "Mathematical Systems in Economics", classmath = "*90C10 90C09 90C05 90-02 05-02 05A05 05A15 05C05 05C30 05C35 05C38 94C15 05C50 65K05 68Q25", language = "German", }