%0 Journal Article %A O. V. Shalaevskii %T On an approximate procedure while fitting the observations with unknown weights %J Zapiski Nauchnykh Seminarov POMI %D 1977 %P 139-144 %V 74 %U http://geodesic.mathdoc.fr/item/ZNSL_1977_74_a5/ %G ru %F ZNSL_1977_74_a5