Matabole politeion. Der Wandel der Staatsverfassungen.
Arno Press, New York, 1973. Photomechanical reprint ed.1949. (VI),282p. Cloth. Series: Greek History. 'The classification of constitutions and the examination of the processes whereby they succeed one another are basic in ancient political theory; in their particular aspect of study as the succession of forms of organized community (...) these questions are the subject of this monograph. (...) Though too much has been attempted for proper discussion, that is not to say that the author has not deserved well in tracing the development of these important ideas from their origins in Greece to their exposition in relation to rome. The argument is supported by a wealth of footnotes (...), and supplemented by a number of appendixes.' (R.J. HOPPER in The Classical Review (New Series), 1951, pp.217-19).