Sakhanenko A. I., Linke Yu. Yu.
          Asymptotically optimal estimation in a linear-fractional regression 
          problem with random errors in coefficients
        Considering the linear-fractional regression problem with errors in 
          independent variables, we construct and study asymptotically optimal 
          estimators for unknown parameters in the case of violation of the classical 
          regression assumptions (the variances of the observations are different 
          and depend on the unknown parameters).