O. I. Barkalov, S. N. Klyamkin, E. S. Efimchenko, V. E. Antonov, “Formation and composition of the clathrate phase in the H<sub>2</sub>O-H<sub>2</sub> system at pressures to 1.8 kbar”, Pis'ma v Zh. Èksper. Teoret. Fiz., 82:7 (2005), 464–466; JETP Letters, 82:7 (2005), 413–415
