Gomonay, E., & Loktev, V. (2007). Shift of close-packed basal planes as an order parameter of transitions between antiferromangetic phases in solid oxygen: II. Temperature/pressure dependence of sound velocities and lattice parameters: Classical Cryocrystals. ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР, 33(6-7), 711–718. https://doi.org/10.1063/1.2746247