@article{EJDE_2008__2008__a7,
     author = {Kelevedjiev,  Petio S. and Palamides,  Panos K. and Popivanov,  Nedyu},
     title = {Another understanding of fourth-order four-point boundary-value problems},
     journal = {Electronic journal of differential equations},
     year = {2008},
     volume = {2008},
     zbl = {1176.34016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2008__2008__a7/}
}