00322nam a2200121Ia 4500082002000000100004700020245002600067260002500093300001000118490003900128500000500167700002800172  a515.35bF554.ND  aFitzgibbon, W. E. and Walker, H. F. d ed.  aNonlinear diffusionb  aLondonbPitmanc1977  a232p.  aResearch notes in Mathematicsv 14  a  aWalker, H. F. ; jt. ed.