Ladas, G. E Differential equations in abstract spaces by G. E. Ladas and V. Lakshmikantham - New York Academic Press 1972 - xi, 218 p. : ill. ; 24 cm. - Mathematics in science and engineering v.85 . Bibliography: p. 211-214. ISBN: 0124326501 LCCN: 72-0182660 Subjects--Topical Terms: Banach spacesDifferential equationsNonlinear operators