@article{motoki_petrakis_soares_sichel_aires_2007,  title={New method of semi-automatic modal analyses for phenocrysts of porphyritic rocks based on quantitative digital colour specification technique},  volume={60},  ISSN={0370-4467},  url={https://doi.org/10.1590/S0370-44672007000100003},  DOI={10.1590/S0370-44672007000100003},  number={1},  journal={Rem: Revista Escola de Minas},  publisher={Escola de Minas},  author={Motoki, Akihisa and Petrakis, Giannis Hans and Soares, Rodrigo and Sichel, Susanna Eleonora and Aires, José Ribeiro},  year={2007},  month={Jan},  pages={13–20} }