[1] T. Glavosits: 
Generated preorders and equivalences. Acta Acad. Paed. Agriensis, Sect. Math. 29 (2002), 95-103. 
MR 1956584 | 
Zbl 1012.08002[2] T. Glavosits: 
Preorders and equivalences generated by, commuting relations. Acta Math. Acad. Paedagog. Nyhazi. (N.S.) 18 (2002), 53-56, (electronic). 
MR 1951732 | 
Zbl 1012.08003[3] T. Glavosits, Á. Száz: 
Decompositions of commuting relations. Acta Math. Inform. Univ. Ostrava 11 (2003), 25-28. 
MR 2037308[5] G. Pataki, Á. Száz: 
A unified treatment of well-chainedness and connectedness, properties.  Acta Math. Acad. Paedagog. Nyhazi. (N.S.) 19 (2003), 101-165, (electronic). 
MR 2037991[6] F. Šik: 
Über Charakterisierung kommutativer. Zerlegungen Spisy vyd. přírod. fak. Masarykovy univ. 1954/3 , 97-102. 
MR 0080105[7] A. Száz: 
Relations bibitemining and dividing each other. Pure Math. Appl. 6 (1995), 385-394. 
MR 1399303