@conferenceObjectPart{QuintenNassSchmidt_1991, title={Synthesis of hydroxyapatite powders by sol-gel techniques}, author={Quinten, Andreas and Nass, RĂ¼diger and Schmidt, Helmut K.}, isbn={3-925543-11-2}, doi={http://dx.doi.org/10.22028/D291-24438}, year={1991} }