Lattices freely generated by partially ordered sets: which can be "drawn"?
Ivan Rival, Rudolf Wille · Journal für die reine und angewandte Mathematik (Crelles Journal) · 1979
Article Lattices freely generated by partially ordered sets: which can be "drawn"? was published on January 1, 1979 in the journal Journal für die reine und angewandte Mathematik (volume 1979, issue 310).