@inbook{401671, title = {2 Elementary properties of integrals of the differential equuation (q)}, booktitle = {Linear Differential Transformations of the Second Order}, series = {GDML\_Books}, publisher = {The English Universities Press, Ltd.}, address = {London}, year = {1971}, pages = {[11]-16}, url = {http://dml.mathdoc.fr/item/401671} }
(éd.). 2 Elementary properties of integrals of the differential equuation (q), dans Linear Differential Transformations of the Second Order, GDML_Books, (1971), pp. [11]-16. http://gdmltest.u-ga.fr/item/401671/