%0 Journal Article %A M. Benalili %T On a class of non linear differential operators of first order with singular point %J Lobachevskii journal of mathematics %D 2005 %P 25-41 %V 17 %I mathdoc %U http://geodesic.mathdoc.fr/item/LJM_2005_17_a2/ %G en %F LJM_2005_17_a2