@conferenceObjectPart{HoebbelEndresPitschHeidemann_1992, title={Solid state 29Si NMR investigation of inorganic-organic polymers with defined silicic acid units}, author={Hoebbel, Dagobert and Endres, Klaus and Pitsch, Irene and Heidemann, D.}, doi={http://dx.doi.org/10.22028/D291-23943}, year={1992} }