@article{VMUMM_2015_4_a6,
     author = {M. P. Efimova},
     title = {The sufficient condition for integrability of a generalized $Q$-integral and points of integrability},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {46--49},
     publisher = {mathdoc},
     number = {4},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2015_4_a6/}
}