%% -*-BibTeX-*- @InCollection{GroeYuan2012, author = "Martin Gr{\"o}tschel and Ya-xiang Yuan", editor = "Martin Gr{\"o}tschel", booktitle = "Optimization Stories", title = "Euler, Mei-Ko Kwan, {K}{\"o}nigsberg, and a Chinese Postman", volume = "Extra Volume: Optimization Stories", publisher = "Documenta Mathematica", address = "Bielefeld", pages = "43--50", month = aug, year = "2012", language = "English", }