Elmes, G. W.; Stradling, D. J. 1991: [Obe, M. V. B.] Insectes Sociaux. International Jopurnal for the Study of Social Arthropods. - Basel, Boston, Berlin (Birkhäuser Verlag)., Basel 38 (3), B15 11262a, pp. 331-332, Portr.