@article{10_1007_s10492_013_0004_8,
     author = {Yao, Qingliu},
     title = {Positive solutions and eigenvalue intervals of a nonlinear singular fourth-order boundary value problem},
     journal = {Applications of Mathematics},
     pages = {93--110},
     publisher = {mathdoc},
     volume = {58},
     number = {1},
     year = {2013},
     doi = {10.1007/s10492-013-0004-8},
     mrnumber = {3022770},
     zbl = {1274.34076},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10492-013-0004-8/}
}