2,13-Diaza[5]helicene: synthesis, theoretical calculations and spectroscopic properties - Caronna, Tullio; Fontana, Francesca; Longhi, Giovanna; Mele, Andrea; Sora, Isabella Natali; Panzeri, Walter; Viganò, Luca (ARKIVOC, 2009)
doi: 10.3998/ark.5550190.0010.812