Template:Elworty&Tromba1970
From Manifold Atlas
K. D. Elworthy and A. J. Tromba, Differential structures and Fredholm maps in Banach manifolds, Global analysis (Berkeley, 1968), Proc. Sympos. Pure Math., 15, pp. 45--94, Amer. Math. Soc., Providence, RI, 1970. MR0264708 (41 #9299) Zbl 0206.52504
