1. and , Proc. V. Internat. Conf. Amorphous and Liquid Semicond., Garmisch-Partenkirchen 1973 (p. 251).
2. Influence of annealing on the optical properties of amorphous germanium films
3. and , Electronic Processes in Non-Crystalline Materials, Clarendon Press, Oxford 1971 (p. 39).
4. and , Proc. V. Internat. Conf. Amorphous and Liquid Semicond., Garmisch-Partenkirchen 1973 (p. 73).
5. Proc. V. Internat. Conf. Amorphous and Liquid Semicond., Garmisch-Partenkirchen 1973 (p. 203).