@article{GDZPPN002404133, title = {A Uniqueness Theorem for Second Order Differential Equations.}, journal = {Mathematische Zeitschrift}, volume = {111}, year = {1969}, pages = {92-96}, zbl = {0172.10902}, url = {http://dml.mathdoc.fr/item/GDZPPN002404133} }
Erbe, Lynn. A Uniqueness Theorem for Second Order Differential Equations.. Mathematische Zeitschrift, Tome 111 (1969) pp. 92-96. http://gdmltest.u-ga.fr/item/GDZPPN002404133/