@article{CMFD_2006_16_a1,
     author = {M. K. Grammatikopulos and P. S. Kelevedzhiev and N. I. Popivanov},
     title = {On the solvability of a~singular boundary-value problem for the equation $f(t,x,x',x'')=0$},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {10--21},
     publisher = {mathdoc},
     volume = {16},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2006_16_a1/}
}