V. A. Litvinov, I. I. Okseniuk, D. I. Shevchenko, V. T. Koppe, V. V. Bobkov, and V. M. Chornous, “SIMS Study of the Surface of TiFe Hydride Forming Alloy”, Ukr. J. Phys., vol. 62, no. 3, p. 195, Dec. 2018.