Khotkevych, N.V., Yu.A. Kolesnichenko, і J.M. van Ruitenbeek. 2013. «Electron Tunneling into Surface States through an Inhomogeneous Barrier: Asymptotically Exact Solution of the Problem and STM Theory». ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР 39 (3). Харків, Україна:384-89. https://doi.org/10.1063/1.4795003.