TY - JOUR AU - Jian Shen AU - Raphael Yuster TI - A note on the number of edges guaranteeing a \(C_4\) in Eulerian bipartite digraphs JO - The electronic journal of combinatorics PY - 2002 VL - 9 UR - http://geodesic.mathdoc.fr/articles/10.37236/1667/ DO - 10.37236/1667 ID - 10_37236_1667 ER -