%0 Journal Article %A Rismanchian, Mohammad Reza %T Group extensions and marginal series of pair of groups %J Comptes Rendus. Mathématique %D 2021 %P 631-638 %V 359 %N 5 %I Académie des sciences, Paris %U http://archive.numdam.org/articles/10.5802/crmath.212/ %R 10.5802/crmath.212 %G en %F CRMATH_2021__359_5_631_0