Ishino, S и др. DNA polymerases as useful reagents for biotechnology: the history of developmental research in the field // Frontiers in Microbiology 5. 29 август 2014. DOI:10.3389/fmicb.2014.00465. с. 465.
iupac.org
goldbook.iupac.org
IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online corrected version: (1996) "Reactant".