Todd, J. F. J. (1991). "Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)". Pure and Applied Chemistry. 63 (10): 1541–1566. doi:10.1351/pac199163101541. S2CID94605898.
Verhoeven, J. W. (1996). "Glossary of terms used in photochemistry (IUPAC Recommendations 1996)". Pure and Applied Chemistry. 68 (12): 2223–2286. doi:10.1351/pac199668122223. S2CID96611767.
Todd, J. F. J. (1991). "Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)". Pure and Applied Chemistry. 63 (10): 1541–1566. doi:10.1351/pac199163101541. S2CID94605898.
Verhoeven, J. W. (1996). "Glossary of terms used in photochemistry (IUPAC Recommendations 1996)". Pure and Applied Chemistry. 68 (12): 2223–2286. doi:10.1351/pac199668122223. S2CID96611767.