1. K. Asada and D. Fujiwara, On some oscillatory integral transformations in $L^{2}(\mathbf{R}^{n})$, Japan. J. Math. 4 (1978), no. 2, 299–361.
2. W. B. Gordon, On the diffeomorphisms of Euclidean space, Amer. Math. Monthly 79 (1972), 755–759.
3. C. Gutiérrez, C. Biasi and E. L. d. Santos, Global inverse mapping theorems, Candernos De Mathemática 10 (2009) 9–18.
4. J. Hadamard, Sur les transformations ponctuelles, Bull. Soc. Math. France 34 (1906), 71–84.
5. R. Hermann, Differential geometry and the calculus of variations, 2nd ed. Interdiscip. Math., Vol. XVII, Math. Sci. Press, Brookline, MA, 1977.