Glushchenko, A. V., and M. Y. Kovalevsky. “MODELS OF HAMILTONIAN AND LOW-FREQUENCY SPECTRA OF COLLECTIVE EXCITATIONS IN SPIN S = 1 MAGNETICS”. East European Journal of Physics 4, no. 2 (August 1, 2017): 4-10. Accessed April 29, 2024. https://periodicals.karazin.ua/eejp/article/view/8952.