@article{VMUMM_2000_6_a16,
     author = {V. I. Gorbachev},
     title = {On the representation of solutions of linear differential equations with variable coefficients},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {68--71},
     publisher = {mathdoc},
     number = {6},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2000_6_a16/}
}