Hell, P., and Nesetril, J.. "Homomorphisms of Graphs and of Their Orientations.." Monatshefte für Mathematik 85 (1978): 39-48. <http://eudml.org/doc/177849>.
@article{Hell1978, author = {Hell, P., Nesetril, J.}, journal = {Monatshefte für Mathematik}, pages = {39-48}, title = {Homomorphisms of Graphs and of Their Orientations.}, url = {http://eudml.org/doc/177849}, volume = {85}, year = {1978}, }
TY - JOUR AU - Hell, P. AU - Nesetril, J. TI - Homomorphisms of Graphs and of Their Orientations. JO - Monatshefte für Mathematik PY - 1978 VL - 85 SP - 39 EP - 48 UR - http://eudml.org/doc/177849 ER -