Spyranti Z, Fragiadaki M, Magafa V, Borovickova L, Spyroulias GA, Cordopatis P, Slaninova J. In position 7 L- and D-Tic-substituted oxytocin and deamino oxytocin: NMR study and conformational insights. Amino Acids. 2010 Jul;39(2):539–48. doi: 10.1007/s00726-009-0470-1. PMID: 20108008.