Mapping properties of a class of univalent functions with pre-assigned zero and pole Z. A. Lewandowski, R. J. Libera, E. J. Zlotkiewicz (1983) Annales Polonici Mathematici
Möbius modulus of ring domains in ℝ ¯ n . Ibragimov, Zair (2003) Annales Academiae Scientiarum Fennicae. Mathematica