1. A. Farkas, Orthohydrogen, Parahydrogen, and Heavy Hydrogen (Cambridge Univ. Press, Cambridge, 1935).
2. R. A. Buyanov, A. G. Zel’dovich, and Yu. K. Pilipenko, Khim. Prom-st’, No. 2, 31 (1961).
3. R. A. Buyanov, A. G. Zel’dovich, and Yu. K. Pilipenko, Gryogenics 2, 143 (1962).
4. R. A. Buyanov, A. G. Zel’dovich, and Yu. K. Pilipenko, Prib. Tekh. Eksp., No. 2, 188 (1961).
5. R. A. Buyanov, Kinet. Katal. 1, 306 (1960).