1. VERMA, G. S.: J. Chem. Phys. 18, 1352–1354 (1950).
2. PINERTON, I.: Proc. Phys. Soc. Lond. B 62, 129–141, 286–299 (1949). Schaaffs, Molekularakustik
3. KISHIMOTO, T., and O. NoMOTO: J. Phys. Soc. Japan 9, 620–627, 1021–1029; (1954); 10, 933–936 (1955).
4. MOKHTAR, M., and H. YovssEF: J. Acoust. Soc. Amer. 30, 549–551 (1958).
5. SETTE, D.: J. Chem. Phys. 19, 1337–1341 (1951); s. a. Coll. Ultrasonore Trill. Koninklijke Vlaasme Ac., Brussel 1951. S. 153–163.