@article{GDZPPN002229145,
title = {An operator-theoretic approach to theorems of the Pick-Nevanlinna and carath\'eodory types.},
journal = {Manuscripta mathematica},
volume = {61},
year = {1988},
pages = {131-144},
zbl = {0659.47022},
url = {http://dml.mathdoc.fr/item/GDZPPN002229145}
}
Pták, Vlastimil. An operator-theoretic approach to theorems of the Pick-Nevanlinna and carathéodory types.. Manuscripta mathematica, Tome 61 (1988) pp. 131-144. http://gdmltest.u-ga.fr/item/GDZPPN002229145/