@inbook{401670,
title = {1 Introduction},
booktitle = {Linear Differential Transformations of the Second Order},
series = {GDML\_Books},
publisher = {The English Universities Press, Ltd.},
address = {London},
year = {1971},
pages = {3-10},
url = {http://dml.mathdoc.fr/item/401670}
}
(éd.). 1 Introduction, dans Linear Differential Transformations of the Second Order, GDML_Books, (1971), pp. 3-10. http://gdmltest.u-ga.fr/item/401670/