%0 Journal Article %A Albertson, Michael O. %A Berman, David M. %T An acyclic analogue to Heawood's theorem %J Glasgow mathematical journal %D 1978 %P 163-166 %V 19 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S001708950000358X/ %R 10.1017/S001708950000358X %F 10_1017_S001708950000358X