B. Basu, and D. Chowdhury. (2013)cite arxiv:1302.1063 Comment: one reference is added, some notation is changed, Accepted for publication in Annals of physics.
S. Yonezawa, T. Kajikawa, and Y. Maeno. (2012)cite arxiv:1212.4954 Comment: 13 pages (Main text: 5 pages; Supplemental Material: 8 pages). To be published in Physical Review Letters.
J. Pujos, and A. Maggs. (2012)cite arxiv:1211.6601 Comment: 7 pages; CECAM workshop: New Challenges in Electrostatics of Soft and Disordered Matter (May 7, 2012 to May 10, 2012): http://www.cecam.org/workshop-0-689.html.
S. Savel'ev, W. Hausler, and P. Hanggi. (2012)cite arxiv:1210.7609 Comment: 5 pages, 1 figure, Phys. Rev. Lett. (2012) (in press); Phys. Rev. Lett. (2012).
E. Sonin. (2012)cite arxiv:1210.3451 Comment: 12 pages, 4 figures, to be published in J. Low Temp. Phys. (Proceedings of the Int. Conference on Quantum Fluids and Solids, Lancaster, 2012).