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Thomas Güthner, Bernd Mertschenk and Bernd Schulz "Guanidine and Derivatives" in Ullmann's Encyclopedia of Industrial Chemistry, 2006, Wiley-VCH, Weinheim. Güthner, Thomas; Mertschenk, Bernd; Schulz, Bernd (2006). „Guanidine and Derivatives”. Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. ISBN978-3-527-30385-4. doi:10.1002/14356007.a12_545.pub2.
Tetko, I. V.; Tanchuk, V. Y.; Kasheva, T. N.; Villa, A. E. (2001). „Estimation of aqueous solubility of chemical compounds using E-state indices”. Journal of Chemical Information and Computer Sciences. 41 (6): 1488—1493. PMID11749573. doi:10.1021/ci000392t.Текст „noedit” игнорисан (помоћ)
Ertl, P.; Rohde, B.; Selzer, P. (2000). „Fast calculation of molecular polar surface area as a sum of fragment-based contributions and its application to the prediction of drug transport properties”. Journal of Medicinal Chemistry. 43 (20): 3714—3717. PMID11020286. doi:10.1021/jm000942e.Текст „noedit” игнорисан (помоћ)
Tetko, I. V.; Tanchuk, V. Y.; Kasheva, T. N.; Villa, A. E. (2001). „Estimation of aqueous solubility of chemical compounds using E-state indices”. Journal of Chemical Information and Computer Sciences. 41 (6): 1488—1493. PMID11749573. doi:10.1021/ci000392t.Текст „noedit” игнорисан (помоћ)
Ertl, P.; Rohde, B.; Selzer, P. (2000). „Fast calculation of molecular polar surface area as a sum of fragment-based contributions and its application to the prediction of drug transport properties”. Journal of Medicinal Chemistry. 43 (20): 3714—3717. PMID11020286. doi:10.1021/jm000942e.Текст „noedit” игнорисан (помоћ)