Publisher
- leibniz zas berlin, berlin, germany5
- lund univ, lund, sweden5
- presov univ, presov, slovakia5
- stellenbosch univ, stellenbosch, south africa5
- univ autonoma barcelona, barcelona, spain5
- univ belgrade, belgrade, serbia5
- univ konstanz, constance, germany5
- univ luxembourg, luxembourg, luxembourg5
- univ oslo, oslo, norway5