@article{00022182, title = {Unique solution of periodic boundary value problems.}, journal = {Journal of Applied Mathematics and Stochastic Analysis}, volume = {4}, year = {1991}, pages = {129-136}, doi = {10.1155/S1048953391000096}, zbl = {0741.34009}, language = {en}, url = {http://dml.mathdoc.fr/item/00022182} }
Sun, Yong. Unique solution of periodic boundary value problems.. Journal of Applied Mathematics and Stochastic Analysis, Tome 4 (1991) pp. 129-136. doi : 10.1155/S1048953391000096. http://gdmltest.u-ga.fr/item/00022182/