MacDonald, C. J., Little, R., Moore, G. R. and Malin, G (1996) NMR Spectroscopy as a Probe for DMSP and Glycine Betaine in Phytoplankton Cells. In: Biological and Environmental Chemistry of DMSP and Related Sulfonium Compounds. Plenum Press, pp. 45-54. ISBN 978-0306453069