Scaling relations and critical exponents for two dimensional two parameter maps D. Stynes, W. G. Hanan, S. Pouryahya and D. M. Heffernan Eur. Phys. J. B, 77 4 (2010) 469-478 Published online: 16 September 2010 DOI: 10.1140/epjb/e2010-00265-4