@article{10_4064_ap_69_3_265_270,
     author = {Lingbin Kong and Daqing Jiang},
     title = {Multiple positive solutions of a nonlinear fourth order periodic boundary value problem},
     journal = {Annales Polonici Mathematici},
     pages = {265--270},
     publisher = {mathdoc},
     volume = {69},
     number = {3},
     year = {1998},
     doi = {10.4064/ap-69-3-265-270},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-69-3-265-270/}
}