[1] Frič, R.:
Rationals with exotic convergences II. Math. Slovaca 40 (1990), 389–400.
MR 1120969
[2] Frič, R. and Koutník V.:
Completions of convergence groups. in: General Topology and its Relations to Modern Analysis and Algebra VI (Proc. Sixth Prague Topological Sympos., 1986), Helderman Verlag, Berlin, 1988, pp. 187–201.
MR 0952605
[3] Frič, R. and Koutník, V.:
Completions for subcategories of convergence rings. in: Categorical Topology and its Relations to Ananlysis, Algebra and Combinatorics (Praha 1988), World Scientific Publishing Co., Singapore, 1989, pp. 195–207.
MR 1047901
[4] Frič, R. and Zanolin, F.:
A convergence group having no completion. in: Convergence Structures and Appications II, Abh. Adak, Wiss. DDR, Abt. Math.-Naturwiss.-Technik, 1984, Nr. 2N, Akademie-Verlag, Berlin, 1984, pp. 47–48.
MR 0790151
[5] Frič, R. and Zanolin, F.:
Sequential convergence in free groups. Rend. Ist. Matem. Univ. Trieste 18 (1986), 200–218.
MR 0928331
[6] Frič, R. and Zanolin, F.:
Relatively coarse convergence groups. (to appear).
MR 0835476
[9] Koutník, V.:
On completion of abelian $L_0^*$-groups. in: Generalized Functions and Convergence (Katowice 1988), World Scientific Publishing Co., Singapore, 1990, pp. 335–341.
MR 1085521
[10] Koutník, V. and Novák, J.: Completion of a class of convergence rings. (to appear).
[11] Novák, J.:
On convergence groups. Czechoslovak Math. J. 20 (1970), 357–384.
MR 0263973
[12] Novák, J.:
On completions of convergence commutative groups. in: General Topology and its Relations to Modern Analysis and Algebra III (Proc. Third Prague Topological Sympos., 1971), Academia, Praha, 1972, pp. 335–340.
MR 0365451
[13] Novák, J.: Convergences $L_S^H$ on the group of real numbers. (Seminar notes).