Properties WORTH and WORTH * , ( 1 + δ ) embeddings in Banach spaces with 1-unconditional basis and wFPP. Fetter, Helga; De Buen, Berta Gamboa — 2010 Fixed Point Theory and Applications [electronic only]
Geometric properties related to the fixed point property in Banach spaces. Helga Fetter; Berta Gamboa De Buen — 2000 Revista de la Real Academia de Ciencias Exactas Físicas y Naturales