Some Properties of f''/f' and the Poincare Metric
B. Osgood
Indiana University Mathematics Journal
1982
text
pdf
10.1512/iumj.1982.31.31037
10.1512/iumj.1982.31.31037
en
Indiana Univ. Math. J. 31 (1982) 449 - 461
state-of-the-art mathematics
http://iumj.org/access/