(2) R. Weissberger ed., Technique of Organic Chemistry, Physical Methods of Organic Chemistry, 3 rd ed., Chapter IV, Interscience Publ., New York, 1959, vol. I, Part I
(2) R. Weissberger ed., Technique of Organic Chemistry, Physical Methods of Organic Chemistry, 3 rd ed., Chapter IV, Interscience Publ., New York, 1959, vol. I, Part I