1. Septième Congr. Intern. de Microscopie Électronique;Barna,1970
2. Proc. Intern. Symp. on Basic Problems in Thin Film Physics;Pócza,1965
3. Structural, Electrical, and Optical Properties of Amorphous Germanium Films
4. Congr. Intern. sur les Couches Minces;Theye,1971
5. Phase Transformations in Solids;Smoluchowski,1951