%0 Journal Article %A Harold Fredricksen %A Melvin M. Sweet %T Symmetric sum-free partitions and lower bounds for Schur numbers %J The electronic journal of combinatorics %D 2000 %V 7 %U http://geodesic.mathdoc.fr/articles/10.37236/1510/ %R 10.37236/1510 %F 10_37236_1510