@inbook{400399, title = {IV. Linear boundary value problems for ordinary differential equations}, booktitle = {Differential and Integral Equations}, series = {GDML\_Books}, publisher = {Academia}, address = {Praha}, year = {1979}, pages = {138-163}, url = {http://dml.mathdoc.fr/item/400399} }
(éd.). IV. Linear boundary value problems for ordinary differential equations, dans Differential and Integral Equations, GDML_Books, (1979), pp. 138-163. http://gdmltest.u-ga.fr/item/400399/