海量图书期刊资源,随时随地畅享阅读乐趣
Permutations with limited repetitionsRoberto Frucht · 1966
On the corona of two graphsRoberto Frucht; Frank Harary · Aequationes Mathematicae · 1970
HOW TO DESCRIBE A GRAPHRoberto Frucht · 1970
5639Wyler, Oswald; van Lint, J. H.; Frucht, Roberto · The American Mathematical Monthly · 1969
E1930Simeon Reich and Roberto W. Frucht · The American Mathematical Monthly · 1968
5636E. C. Jones and Roberto Frucht · The American Mathematical Monthly · 1969