1. L. Ahlfors, The theory of meromorphic curves, Acta Soc. Sci. Fenn, Nova Ser. A 3 (4) (1941), 171–183.
2. Lecture Notes in Mathematics;A Andreotti,1971
3. A. Baerenstein, Proof of Edrei’s spread conjecture. Proc. London Math. Soc., 26 (1973), 418–434.
4. A. Biancofiore, A hypersurface defect relation for a class of meromorphic maps, Trans. Amer. Math. Soc., 270 (1982), 47–60.
5. Annals of Math. Studies;A Biancofiore,1981