pid type title authors mentors source_title published_date url doi isbn issn eissn fer:7074 dissertation "Optimization radio frequency components of cryogenic nuclear magnetic resonance spectroscopy system." "Kolar, Petar" pmf:8617 "journal article" "Sensitivity enhancement of NMR spectroscopy receiving chain used in condensed matter physics" "Kolar, Petar; Grbić, Mihael S.; Hrabar, Silvio" fer:1195 thesis "Upotreba nefosterovskog negativnog kondenzatora u strukturama za subvalno tuneliranje i raspršenje elektromagnetske energije" "Kolar, Petar"