URN:NBN:SI:doc-BH93QLDC2013documents/doc/B/URN_NBN_SI_doc-BH93QLDC_001.htmdocuments/doc/B/URN_NBN_SI_doc-BH93QLDC_001.pdfdocuments/doc/B/URN_NBN_SI_doc-BH93QLDC_001.txt119151journal157067132232-2094URN:NBN:SI:doc-BH93QLDCengInštitut za matematiko, fiziko in mehanikoPreprint series (Ljubljana)InC