Factor Sequences and Their Algebras. G.M. Petersen (1972/1973) Jahresbericht der Deutschen Mathematiker-Vereinigung
Factor sequences and their algebras II. G.M. Petersen (1973/1974) Jahresbericht der Deutschen Mathematiker-Vereinigung
Formulas for sums of powers of integers by functional equations. Donald R. Snow (1978) Aequationes mathematicae