pid type title authors mentors source_title published_date url doi isbn issn eissn fer:2964 thesis "Primjena diferencijalne geometrije u prilagodbi nelinearnih modela metodom najmanjih kvadrata" "Gulin, Luka" pmf:1836 thesis "Elektrodinamika crnih rupa" "Gulin, Luka" pmf:8102 "journal article" "Nonlinear electromagnetic fields and symmetries" "Barjašić, Irena; Gulin, Luka; Smolić, Ivica"