@article{00823350,
title = {Existence theorems for a second order },
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {18},
year = {1995},
pages = {705-710},
doi = {10.1155/S0161171295000901},
zbl = {0839.34027},
language = {en},
url = {http://dml.mathdoc.fr/item/00823350}
}
Gupta, Chaitan P. Existence theorems for a second order . International Journal of Mathematics and Mathematical Sciences, Tome 18 (1995) pp. 705-710. doi : 10.1155/S0161171295000901. http://gdmltest.u-ga.fr/item/00823350/