@article{EJDE_2005__2005__a21,
     author = {Mavridis,  Kyriakos G. and Tsamatos,  Panagiotis Ch.},
     title = {Two positive solutions for second-order functional and ordinary boundary-value problems},
     journal = {Electronic journal of differential equations},
     year = {2005},
     volume = {2005},
     zbl = {1075.34057},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2005__2005__a21/}
}