1. Agard, S., and Marden, A. A removable singularity theorem for local homeomorphisms. Indiana Univ. Math. J. 20 (1970/1971), 455–461.
2. Hayman, W. K.Multivalent functions. Cambridge Tracts in Mathematics and Mathematical Physics, No. 48. Cambridge University Press, Cambridge, 1958.
3. Ibragimov, Z. S.The Apollonian metric, sets of constant width and Moebius modulus of ring domains. ProQuest LLC, Ann Arbor, MI, 2002. Thesis (Ph.D.)–University of Michigan.
4. Klén, R. Local convexity properties of j-metric balls. Ann. Acad. Sci. Fenn. Math. 33, 1 (2008), 281–293.
5. Klén, R. Local convexity properties of quasihyperbolic balls in punctured space. J. Math. Anal. Appl. 342, 1 (2008), 192–201.