1. L. Ahlfors, Normalintegrale auf offenen Riemannschen Flächen. Ann. Acad. Sci. Fennicae. Ser. A. I. Math.-Phys. 1947(35), 24 (1947)
2. A. Alexandrov, Uniqueness theorems for surfaces in the large, V. Am. Math. Soc. Transl. (2) 21, 412–416 (1962)
3. E.D. Belokolos, A.I. Bobenko, V.Z. Enol’skii, A.R. Its, V.B. Matveev, Algebro-Geometric Approach to Nonlinear Integrable Equations (Springer, Berlin, 1994)
4. A. Bobenko, All constant mean curvature tori in R 3, S 3, H 3 in terms of theta-functions. Math. Ann. 290, 209–245 (1991)
5. A. Bobenko, Constant mean curvature surfaces and integrable equations. Usp. Mat. Nauk 46(4), 3–42 (1991)