@article{10_4064_ap88_2_7,
     author = {K. G. Mavridis and Ch. G. Philos and P. Ch. Tsamatos},
     title = {Multiple positive solutions for a second order
 delay boundary value problem on the half-line},
     journal = {Annales Polonici Mathematici},
     pages = {173--191},
     publisher = {mathdoc},
     volume = {88},
     number = {2},
     year = {2006},
     doi = {10.4064/ap88-2-7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap88-2-7/}
}