Abelian binomials, power residues and exponential congruences Andrzej Schinzel (1977) Acta Arithmetica
Addendum and corrigendum to the paper "Abelian binomials, power residues and exponential congruences", Acta Arith. 32(1977), pp. 245-274 Andrzej Schinzel (1980) Acta Arithmetica
An Arithmetic Characterization of the Rational Homotopy Groups of Certain Spaces. John B. Friedlander, S. Halperin (1979) Inventiones mathematicae