%0 Journal Article %A AGAFONOV, S. I. %A FERAPONTOV, E. V. %T INTEGRABLE FOUR-COMPONENT SYSTEMS OF CONSERVATION LAWS AND LINEAR CONGRUENCES IN ${\mathbb P}^5$ %J Glasgow mathematical journal %D 2005 %P 17-32 %V 47 %N A %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089505002259/ %R 10.1017/S0017089505002259 %F 10_1017_S0017089505002259