1. BERGMAN, F, METHODS BIOCH ANAL 6: 79 (1958).
2. BREHM, S, HORAE SOCIETATIS ENTOMOLOGICAE ROSSICAE 11: 177 (1880).
3. KHALIFA, A, PROCEEDINGS OF THE ROYAL ENTOMOLOGICAL SOCIETY OF LONDON. SERIES A 25: 53 (1950).
4. Pfleiderer, W., Ciba Foundation Symposium on the Chemistry and Biology of Purines: 77 (1957).
5. ROTH, L.M., A STUDY OF COCKROACH BEHAVIOR, AMERICAN MIDLAND NATURALIST 47: 66 (1952).