[1] Dikranjan D.: Minimal topologies on Abelian groups. Seminar notes, Universita Padova, Padova 1983.

[2] Dikranjan D., Frič R., Zanolin F.: On convergence groups with dense coarse subgroups. Czechoslovak Math. J. 37 (112) (1987), 471-479. MR 0904771

[3] Frič R., Zanolin F.: Coarse convergence groups. Convergence Structures 1984, Proceedings of the Conference on Convergence held in Bechyně (Czechoslovakia) September 24-28, 1984. Mathematical Research 24, Akademie-Verlag, Berlin 1985, 107-114. MR 0835476

[4] Frič R., Zanolin F.: Sequential convergence in free groups. (To appear.) MR 0928331

[5] Novák J.: On convergence groups. Czechoslovak Math. J. 20 (1970), 357-374. MR 0263973

[6] Prodanov J., Stojanov L.: Every minimal Abelian group is precompact. С. R. Acad. Bulgare Sci. 37 (1984), 23-26. MR 0748738

[7] Simon P., Zanolin F.: A coarse convergence group need not be precompact. Czechoslovak Math. J. 37 (112) (1987), 480-486. MR 0904772 | Zbl 0637.22003

[8] Stephenson R.: Minimal topological groups. Math. Ann. 192 (1971), 193-195. DOI 10.1007/BF02052870 | MR 0286934