@article{702192,
     title = {Preface},
     booktitle = {Equadiff IV},
     series = {GDML\_Books},
     publisher = {Springer-Verlag},
     address = {Berlin},
     year = {1979},
     pages = {[I]-[I]},
     url = {http://dml.mathdoc.fr/item/702192}
}

 (éd.). Preface, dans Equadiff IV, GDML_Books,  (1979), p. [I]. http://gdmltest.u-ga.fr/item/702192/