@article{702167,
     title = {Preface},
     booktitle = {Differential Equations and Their Applications},
     series = {GDML\_Books},
     publisher = {Publishing House of the Czechoslovak Academy of Sciences},
     address = {Prague},
     year = {1963},
     pages = {5-5},
     url = {http://dml.mathdoc.fr/item/702167}
}

 (éd.). Preface, dans Differential Equations and Their Applications, GDML_Books,  (1963), p. 5. http://gdmltest.u-ga.fr/item/702167/