Yubuta, K., Mori, T., Leithe-Jasper, A., Grin, Y., Okada, S., & Shishido, T. (2009). Direct observation of the intergrown α-phase in β -TmAlB4 via high-resolution electron microscopy. Materials Research Bulletin, 44, 1743-1746. doi:10.1016/j.materresbull.2009.03.013.