M. F. Butman, V. B. Motalov, L. S. Kudin, A. S. Kryuchkov, A. E. Grishin, K. W. Krämer. A jump change in the sublimation coefficient of the PrBr3 single crystal at the polymophic transition point // Russian Journal of Physical Chemistry A, Focus on Chemistry. — 2008. — Т. 82, № 11. — С. 1972-1974. — doi:10.1134/S0036024408110332.