1H and 13C NMR Chemical shift assignments of a cyclopentane-fused cis-azetidinone (cis-azabicyclo[3.2.0]heptan-7-one). A theoretical and experimental investigation - Dezső, Gergely; Evanics, Ferenc; Dombi, György; Bernáth, Gábor (ARKIVOC, 2002)
doi: 10.3998/ark.5550190.0002.310