Tanabe, Y., Fujimaki, Y., Kojima, K., Uchida, S., Onari, S., Matsuo, T., Azuma, S., & Hanamura, E. (2005). Direct optical excitation of two and three magnons in a-Fe2O3. ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР, 31(8-9), 1024–1031. https://doi.org/10.1063/1.2008139