@article{10.30755/NSJOM.02415,
     author = {Yuji Liu and Xiaohui Yang},
     title = {Existence and non-existence of positive solutions of four-point {BVPs} for
second order ordinary differential equations on whole line},
     journal = {Novi Sad Journal of Mathematics},
     pages = {79 - 103},
     publisher = {mathdoc},
     volume = {46},
     number = {1},
     year = {2016},
     doi = {10.30755/NSJOM.02415},
     url = {http://geodesic.mathdoc.fr/articles/10.30755/NSJOM.02415/}
}