@article{702437,
     title = {Preface},
     booktitle = {Nonlinear Analysis, Function Spaces and Applications},
     series = {GDML\_Books},
     publisher = {B. G. Teubner Verlagsgesellschaft},
     address = {Leipzig},
     year = {1990},
     pages = {3-3},
     url = {http://dml.mathdoc.fr/item/702437}
}

Krbec, Miroslav; Kufner, Alois; Opic, Bohumír; Rákosník, Jiří. Preface, dans Nonlinear Analysis, Function Spaces and Applications, GDML_Books,  (1990), p. 3. http://gdmltest.u-ga.fr/item/702437/