Fluorescein Hapten: An Immunological Probe by Edward W. Voss, CRC Press (1984). This reference serves as a good review of the anti- fluorescein system. Perhaps 100 journal articles were written over the course of 20 years with Edward W. Voss as the principal investigator. The entire amino acid sequence of the Fab fragment has been published and the structure of the antibody solved by crystallization to about 3.0 angstroms.