comparing coefficient of variation for multiple samples

I have three sets of data sets each 10 to 20 data points. I want to test if the coefficient of variation is the same across all the sets. Please suggest relevant methods.

I came across papers by Cabras(2006) and Amiri(2010). One, they look at comparing only two samples and two, my knowledge of simulation / econometric methods is elementary. Are there packages in [R] or Stata that are available to do this?