1. Aminov, J. On the immersions of n-dimensional Lobačevskii space in 2n − 1 dimensional Euclidean space,Soviet Math. Dokl.,18, 1210–1213, (1977).
2. Bianchi, L. “Lezioni di Geometria Differenziale,” Bologna, 1927.
3. Darboux, G. “Lecons sur les systémes orthogonaux et les coordonnées curvilignes,” Gauthier-Villars, Paris, 1910.
4. Dajczer, M. and Tojeiro, R. Isometric immersions and the Generalized Laplace and Elliptic Sinh-Gordon equations,J. Reine Angew. Math.,467, 109–147, (1995).
5. Dajczer, M. and Tojeiro, R. Flat totally real submanifolds of ⧃ℙ n and the Symmetric Generalized Wave Equation,Tôhoku Math. J.,47, 117–123, (1995).