Questions on set squaring in groups
Structure theory of set addition, Astérisque, no. 258 (1999), 5 p. 
@incollection{AST_1999__258__249_0,
     author = {Berkovich, Yakov},
     title = {Questions on set squaring in groups},
     booktitle = {Structure theory of set addition},
     editor = {Deshouilliers Jean-Marc and Landreau Bernard and Yudin Alexander A.},
     series = {Ast\'erisque},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {258},
     year = {1999},
     zbl = {0945.20015},
     mrnumber = {1701202},
     language = {en},
     url = {http://archive.numdam.org/item/AST_1999__258__249_0/}
}
Berkovich, Yakov. Questions on set squaring in groups, dans Structure theory of set addition, Astérisque, no. 258 (1999), 5 p. http://archive.numdam.org/item/AST_1999__258__249_0/

[1] Berkovich Y. G., Zhmud' E. M., Characters of finite groups, Part 1, 2, Amer. Math. Soc., Providence, Rhode Island, 1998. | MR 1486039 | Zbl 0934.20009

[2] Berkovich Y. G., Freiman G. A. and Praeger C. E., Small squaring and cubing properties of finite groups, Bull. Austral. Math. Soc., 44, 1991, 429-450. | Article | MR 1138020 | Zbl 0728.20020

[3] Brailovsky L., Freiman G. A. and Herzog M., Special elements in groups, Suppl. Rend. Circ. Mat. Palermo, 2 (23) , 1990, 33-42. | MR 1068347 | Zbl 0711.20014

[4] Brailovsky L., Freiman G. A., On two-elements subsets in groups, Ann. N.Y. Acad. Sci., 373, 1981, 183-190. | Article | MR 719039 | Zbl 0579.20017

[5] Brodsky S., this volume.

[6] Freiman G. A., On two- and three-element subsets of groups, Æquat. Math., 22 , 1981, 140-152. | EuDML 136869 | MR 645414 | Zbl 0489.20020

[7] Herzog M., Longobardi P. and Maj M., On a combinatorial problem in group theory, Israel J. Math., 82, 1993, 329-340. | Article | MR 1239053 | Zbl 0794.20041