%0 Journal Article %A I. M. Krichever %T An analogue of d'Alembert's formula for the equations of the principal chiral field and for the Sine-Gordon equation %J Doklady Akademii Nauk %D 1980 %P 288-292 %V 253 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1980_253_2_a8/ %G ru %F DAN_1980_253_2_a8