| Valterova, I., and Svatos, A. 1996. Analysis of the labial gland secretion of the cuckoo-bumblebee (Psithyrus vestalis) males and synthesis of abundant geranylcitronellol. CCCC. 61:1501-1508. |
| |
| Kullenberg, B., Bergström, G., and Ställberg-Stenhagen, S. 1970. Volatile components of the marking secretion of male bumblebees. Acta Chem. 24:1481-1483. |
| |