@article{GroetschelYuan2012, author = {Martin Gr{\"o}tschel and Ya-xiang Yuan}, title = {Euler, Mei-Ko Kwan, K{\"o}nigsberg, and a Chinese Postman}, journal = {Documenta Mathematica - Optimization Stories}, editor = {Martin Gr{\"o}tschel}, volume = {Extra Vol.: Optim. Stories}, pages = {43 -- 50}, url = {http://www.mathematik.uni-bielefeld.de/documenta/vol-ismp/16_groetschel-martin-yuan-ya-xiang.pdf}, year = {2012}, }