Methods of constructing hyperfields. Massouros, Ch.G. — 1985 International Journal of Mathematics and Mathematical Sciences
On the semi-sub-hypergroups of a hypergroup. Massouros, Ch.G. — 1991 International Journal of Mathematics and Mathematical Sciences
Fortified Join hypergroups G.G. Massouros; Ch.G. Massouros; I.D. Mittas — 1996 Annales mathématiques Blaise Pascal