Palmer, R., Guo, Q., Yin, J., Palmer, R., Bampos, N., & Sanders, J. (2005). Giant contrast reversal in scanning tunnelling microscopy of zincporphyrin monolayers on graphite. Chemical Physics Letters, 402(1-3), pp. 121-125. doi:10.1016/j.cplett.2004.12.007

Palmer, Richard, Q. Guo, J. Yin, R.E Palmer, N. Bampos, and J.K.M Sanders. "Giant Contrast Reversal in Scanning Tunnelling Microscopy of Zincporphyrin Monolayers On Graphite." Chemical Physics Letters 402, no. 1-3 (2005): 121-125.

Palmer, Richard, et al. "Giant Contrast Reversal in Scanning Tunnelling Microscopy of Zincporphyrin Monolayers On Graphite." Chemical Physics Letters 402.1-3 (2005): 121-125.