@conferenceObjectPart{SchmidtKrugKasemannTiefensee_1991,
title={Development of optical wave guides by sol-gel techniques for laser patterning},
author={Schmidt, Helmut K. and Krug, Herbert and Kasemann, Reiner and Tiefensee, Frank},
isbn={0-8194-0721-6},
doi={http://dx.doi.org/10.22028/D291-24396},
year={1991}
}