@conferenceObjectPart{HouMennigSchmidt_1994,
title={Photochromic organic-inorganic composite materials prepared by sol-gel processing : properties and potentials},
author={Hou, Lisong and Mennig, Martin and Schmidt, Helmut K.},
isbn={0-8194-1564-2},
doi={http://dx.doi.org/10.22028/D291-24449},
year={1994}
}