@article{04059861,
title = {Solvability of a fourth order boundary value problem with periodic boundary conditions.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {11},
year = {1988},
pages = {275-284},
doi = {10.1155/S016117128800033X},
zbl = {0649.34028},
language = {en},
url = {http://dml.mathdoc.fr/item/04059861}
}
Gupta, Chaitan P. Solvability of a fourth order boundary value problem with periodic boundary conditions.. International Journal of Mathematics and Mathematical Sciences, Tome 11 (1988) pp. 275-284. doi : 10.1155/S016117128800033X. http://gdmltest.u-ga.fr/item/04059861/