"79612749" . "J. Pure Appl. Algebra" . "0.72" . "1971" . . . "JPAAA2" . "Journal of Pure and Applied Algebra" . "0022-4049" . . . "1800179" . . . . . . . . "2017" . . . . . . . . "Monthly" . "Journal of Pure and Applied Algebra" . .