@misc{zhao_the_gksspolarized_1991, 
author={Zhao, J.,Meerwinck, W.,Niinikoski, T.,Rijllart, A.,Schmitt, M.,Willumeit, R.,Stuhrmann, H.},
title={The GKSS-polarized target},
year={1991},
howpublished = {conference lecture: Bad Honnef (D); June 20-22, 1991},
note = {Online available at: \url{} (DOI). Zhao, J.; Meerwinck, W.; Niinikoski, T.; Rijllart, A.; Schmitt, M.; Willumeit, R.; Stuhrmann, H.: The GKSS-polarized target. 7th International Workshop on Polarized Target Materials and Techniques. Bad Honnef (D), 1991.}}