A fixed point theorem for a class of multi-valued continuously differentiable maps

Wydawnictwa / Czasopisma IMPAN / Annales Polonici Mathematici / Wszystkie zeszyty

Gilles Fournier, Donald Violette Annales Polonici Mathematici 47 (1987), 381-402 DOI: 10.4064/ap-47-3-381-402