1972

28. Gridnev S.A., Darinskii B.M., Postnikov V.S. Investigation of internal friction features in Rochelle salt crystal at Hertz frequency oscillations // 14 Interuniversity conf. on application of acoustics to study of materials, Moscow, February 1972.
29. Gridnev S.A. Time dependences of internal friction in PZT ferroelectric ceramics // Science-technical seminar “Novel piezo- and ferroelectric materials and their application in electronic set-ups”, Moscow, MDNTP, May 1972.
30. Pavlov V.S., Gridnev S.A., Massarsky I.I. Effect of fifth-valency oxide on mechanical and electric properties of lead titanate // 6-th Interbranch meeting on methods of preparing and analysis of ferrite, ferroelectric, piezoelectric and capacitors materials, Donetsk, September 1972.