Direct and inverse problems in additive number theory and in non-abelian group theory. - Gregory A. Freiman; Marcel Herzog; Patrizia Longobardi; Mercede Maj; Yonutz Stanchescu (Eur. J. Comb., 2014)

A small doubling structure theorem in a Baumslag-Solitar group. - Gregory A. Freiman; Marcel Herzog; Patrizia Longobardi; Mercede Maj; Yonutz Stanchescu (Eur. J. Comb., 2015)

Small doubling in ordered nilpotent groups of class 2. - Gregory A. Freiman; Marcel Herzog; Patrizia Longobardi; Mercede Maj; Yonutz Stanchescu (Eur. J. Comb., 2018)

Sums of element orders in groups of odd order. - Marcel Herzog; Patrizia Longobardi; Mercede Maj (Int. J. Algebra Comput., 2021)