TY  - CHAP
A1  - Appell, Jürgen
A2  - Singh, S. P.
T1  - G. Darbo's fixed point principle after 30 years
T2  - Nonlinear functional analysis and its applications
Y1  - 1986
UR  - https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/14307
SN  - 978-90-277-2211-9
SP  - 161
EP  - 167
PB  - Springer
CY  - Dordrecht
ER  -