1. Fahrenbach, W. H., J. Cell Biol.44 (1970) 457.
2. Markl, J., Stumpp, S., Bosch, F. X. and Voit, R., in: Invertebrate Dioxygen Carriers, pp. 497–503. Eds G. Préaux and R. Lontie. Leuven University Press, Leuven 1990.
3. Préaux, G., Vandamme, A., Béthune, B., Jacobs, M. P., and Lontie, R., in: Invertebrate Oxygen Carriers, pp. 485–488. Ed. B. Linzen. Springer Verlag, Berlin and Heidelberg 1986.
4. Senkbeil, E. G., and Wriston, J. C. Comp. Biochem. Physiol.68B (1981) 163–167.
5. Hennecke, R., Gellissen, G., Spindler-Barth, M., and Spindler, K. D., in: Invertebrate Dioxygen Carriers, pp. 503–506. Eds G. Préaux and R. Lontie. Leuven University Press, Leuven 1990.