00353nam a2200133Ia 4500082001900000100002200019245006500041250000800106260003400114300002100148490004000169500000500209700000500214  a515.7bP541.CF  aPhelps, Robert R.  aConvex functions, monotone operators and differentiabilityb  a2nd  aBerlinbSpringer-Verlagc1993  aix, 116p. Index.  aLecture notes in Mathematicsv 1364  a  a