@article{EJDE_2009__2009__a158,
     author = {Rao,  A.Kameswara},
     title = {Positive solutions for a system of nonlinear boundary-value problems on time scales},
     journal = {Electronic journal of differential equations},
     year = {2009},
     volume = {2009},
     zbl = {1179.39005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2009__2009__a158/}
}