@article{oai:ynu.repo.nii.ac.jp:00007006,
 author = {Shilgba, Leonard Karshima},
 issue = {1},
 journal = {Yokohama Mathematical Journal = 横濱市立大學紀要. D部門, 数学},
 month = {},
 note = {application/pdf, In this paper we have applied a variant of Ricceri's three critical points theorem provided by Averna and Bonanno to establish an existence and multiplicity result for periodic solutions of a system of differential equations involving a real parameter.},
 pages = {73--80},
 title = {AN APPLICATION OF A THREE CRITICAL POINTS THEOREM TO A SYSTEM OF DIFFERENTIAL EQUATIONS},
 volume = {52},
 year = {2005}
}