Ekino, T., Gabovich, A., & Voitenko, A. (2008). Analysis of the pseudogap-related structure in tunnel spectra of the superconducting Bi₂Sr₂CaCu₂O_8+d revealed by break-junction technique. ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР, 34(6), 515–519. https://doi.org/10.1063/1.2920074