Title information : Fuzzy submonoids, fuzzy preorders and quasi-metrics Variant heading : \q12*stu_us_auth*1 stu74462 \q \q1013 stu_us_auth*stu74462 \d Gerla G. \q  In : \q12**1 stu155878 \q %continue : Fuzzy Sets and Systems %continue : . Vol. 157, Issue 17 (2006), s.2356-2370 Document kind : článok z periodika References : \q2479**1 stu_us_cat*stu157787*amg \q (1) - monografia