Helm, Georg. The Principles of Mathematical Chemistry: The Energetics of Chemical Phenomena. translated by J. Livingston R. Morgan. New York: John Wiley & Sons, 1897. [1] [Архівовано 7 січня 2014 у Wayback Machine.]
jstor.org
links.jstor.org
Огляд книги Ivan Gutman, Oskar E. Polansky, "Mathematical Concepts in Organic Chemistry" in SIAM Review Vol. 30, No. 2 (1988), pp. 348-350
web.archive.org
Helm, Georg. The Principles of Mathematical Chemistry: The Energetics of Chemical Phenomena. translated by J. Livingston R. Morgan. New York: John Wiley & Sons, 1897. [1] [Архівовано 7 січня 2014 у Wayback Machine.]
