@article{ZNSL_1977_74_a1,
     author = {N. K. Bakirov},
     title = {Likelihood ratio for densities with singularity},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {66--82},
     publisher = {mathdoc},
     volume = {74},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1977_74_a1/}
}