@misc{okamoto_the_10_1991, 
author={Okamoto, H., Mukai, T., Ishimoto, H., Azuma, H.},
title={The 10 micron-feature of olivine aggregates in comets},
year={1991},
howpublished = {conference lecture: ;},
note = {Okamoto, H.; Mukai, T.; Ishimoto, H.; Azuma, H.: The 10 micron-feature of olivine aggregates in comets. In: Proceedings of the 24th ISAS Lunar and Planetary Symposium. 1991. 134-140.}}