1.- 3D models of palynofacies of coal using digital holography microscopy Society for Organic Petrology; [location varies]; USA; United States, 2006 Twenty-third annual meeting of the Society for Organic Petrology; abstracts and program Ver registro 2.- Multithresholding segmentation applied to coal petrography Society for Organic Petrology; [location varies]; USA; United States, 2006 Twenty-third annual meeting of the Society for Organic Petrology; abstracts and program Ver registro