David R. Lide: CRC Handbook of Chemistry and Physics: A Ready-reference Book of Chemical and Physical Data. CRC Press, 1995, ISBN 978-0-8493-0595-5 (books.google.com).
A. Kleemann, J. Engel, B. Kutscher, D. Reichert, Axel Kleemann, Jürgen Engel, Bernhard Kutscher, Dietmar Reichert: Pharmaceutical Substances, 5th Edition, 2009: Syntheses, Patents and Applications of the most relevant APIs. Georg Thieme Verlag, 2014, ISBN 978-3-13-179525-0 (books.google.com).