1. F. Krömeke: Friedrich Wilhelm Sertürner, der Entdecker des Morphiums. Lebensbild und Neudruck der Original, Morphiumarbeiten. Gustav Fischer, Jena (1925), 93. This contains a biographical sketch by Dr. Krömeke, with references to older literature on Sertür, and reprints of the five papers on opium and morphine by Sertüner.