1. 1. V.A. Kanchenko, Y.N. Kryn'ko, I.V. Lyubinetsky et al., Ukr. J. of Phys. 35, 1073 (1990).
2. 2. I.V. Lyubinetsky, P.V. Mel'nik, and N.G. Nakhodkin, Metallofiz. 13, 116 (1991).
3. 3. I.V. Lyubinetsky, P.V. Mel'nik, N.G. Nakhodkin et al., Instrum. and Exper. Techn. 36, 766 (1993).
4. A reliable compact ultra-high vacuum scanning tunneling microscope
5. 5. I.V. Lyubinetsky, P.V. Mel'nik, N.G. Nakhodkin et al., in Physical, Chemical, Structural, and Emissive Properties of Thin Films and Solid State Surfaces, edited by N.G. Nakhodkin (Zaporizhzhya, 1995), p. 142.