Kirk, M. D., Smith, D. P., Mitzi, D. B., Sun, J. Z., Webb, D. J., Char, K., … Quate, C. F. (1987). Point-contact electron tunneling into the high-Tc superconductor Y-Ba-Cu-O. Physical Review. B, Condensed Matter, 35(16), 8850–8852. https://doi.org/10.1103/physrevb.35.8850

Kirk, M. D., D. P. Smith, D. B. Mitzi, J. Z. Sun, D. J. Webb, K. Char, M. R. Hahn, et al. “Point-contact electron tunneling into the high-Tc superconductor Y-Ba-Cu-O.” Physical Review. B, Condensed Matter 35, no. 16 (June 1987): 8850–52. https://doi.org/10.1103/physrevb.35.8850.

Kirk MD, Smith DP, Mitzi DB, Sun JZ, Webb DJ, Char K, et al. Point-contact electron tunneling into the high-Tc superconductor Y-Ba-Cu-O. Physical review B, Condensed matter. 1987 Jun;35(16):8850–2.

Kirk, M. D., et al. “Point-contact electron tunneling into the high-Tc superconductor Y-Ba-Cu-O.” Physical Review. B, Condensed Matter, vol. 35, no. 16, June 1987, pp. 8850–52. Epmc, doi:10.1103/physrevb.35.8850.

Kirk MD, Smith DP, Mitzi DB, Sun JZ, Webb DJ, Char K, Hahn MR, Naito M, Oh B, Beasley MR, Geballe TH, Hammond RH, Kapitulnik A, Quate CF. Point-contact electron tunneling into the high-Tc superconductor Y-Ba-Cu-O. Physical review B, Condensed matter. 1987 Jun;35(16):8850–8852.