GCDkit is free for academic use but if you find it of help, please cite the package 'GCDkit' in your publications as follows:
Vojtech Janousek, Colin M. Farrow and Vojtech Erban (2006). Interpretation of whole-rock geochemical data in igneous geochemistry: introducing Geochemical Data Toolkit (GCDkit). Journal of Petrology 47(6): 1255-1259. doi: 10.1093/petrology/egl013
Send any comments, words of encouragement (highly appreciated) and bug reports to vojtech.janousek@geology.cz.
