@misc{sehnal_orbital_perturbations_1991, 
author={Sehnal, L., Vokrouhlicky, D., Straka, J.},
title={Orbital perturbations due to the Albedo effect},
year={1991},
howpublished = {GKSS report},
note = {Sehnal, L.; Vokrouhlicky, D.; Straka, J.: Orbital perturbations due to the Albedo effect. In: Hunt, J. (Ed.): Proceedings of the 3rd Interational Symposium on Spacecraft Flight Dynamics. Darmstadt (D). 1991. 61-64.}}