1. P. Appel’, Theoretical Mechanics, Vol. 1 (Fizmatlit, Moscow, 1960) [in Russian].
2. D. R. Merkin, Introduction to Mechanics of Flexible Thread (Nauka, Moscow, 1980) [in Russian].
3. P. F. Byrd and F. Morris, Handbook of Elliptic Integrals (Springer, Berlin, 1954).
4. H. Bateman and A. Erdelyi, Higher Transcendental Functions (McGraw-Hill, New York, 1953).
5. Higher Transcendental Functions, Vol. 3, Ed. by A. Erdelyi (McGraw-Hill, New York, 1955).