@article{ZNSL_1977_72_a6,
     author = {M. S. Nikulin and I. S. Yusas},
     title = {Distribution of a $\chi^2$ statistic with additional observations used to estimate the unknown parameter},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {98--102},
     publisher = {mathdoc},
     volume = {72},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1977_72_a6/}
}