^IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). オンライン版: (2006-) "polycyclic system".
^Coles, Lydia (1968). “A chromatographic method for the separation of branched-chain and straight-chain compounds of columns containing urea”. Journal of Chromatography A32: 657. doi:10.1016/S0021-9673(01)80544-6.
^IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). オンライン版: (2006-) "silazanes".