Erratum to:J Braz Comput Soc (2012) 18:61–80

DOI 10.1007/s13173-012-0062-x

The following is a list of corrections to several typos found in the original online version of [1]:

  • in the caption of Fig. 10 (p. 75, right column) the correct analytic expression used to draw the reference curve (e) was (1−er)/r, rather than (1−er)/r;

  • Equation (10) (p. 79, left column) should be

  • Equation (14) (p. 79, left column) is valid for t>0.