EUROPHYSICS LETTERS, vol. 68, no. 4, page. 596 - 602, 2004-11
Physical Review E, vol. 85, no. 5, page. 51803-1 - 51803-7, 2012-05-14
EUROPHYSICS LETTERS, vol. 47, no. 3, page. 292 - 297, 1999-08-01
Proc. Natl. Acad. Sci. USA., vol. 109, no. 36, page. 14410 - 14415, 2012-09-04