%0 Journal Article %A Yu. P. Pyt'ev %T On the accuracy and reliability of the interpretation of indirect %J Doklady Akademii Nauk %D 1987 %P 542-545 %V 295 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1987_295_3_a5/ %G ru %F DAN_1987_295_3_a5