@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/