MODELLING SOME MATHEMATICAL OBJECTS AND OPERATIONS ON THEM WITH AN EXPANDED RELATIONAL DATA MODEL Статья Lozovskii N.D., Tolmachev I.L. Programming and computer software. Том 17. 1991. С. 32-37
MODELING SOME MATHEMATICAL OBJECTS AND OPERATIONS ON THEM WITH AN EXPANDED RELATIONAL DATA MODEL Статья LOZOVSKII N.D., TOLMACHEV I.L. Programming and computer software. Том 17. 1991. С. 32-37