1. Multiple origins of colonial green flagellates from unicells;Buchheim;evidence from molecular and organismal characters,1994
2. Conserved sequences and structures of group I introns;Cech;building an active site for RNA catalysis - a review,1988
3. Ribosomal DNA ITS-1 and ITS-2 sequence comparisons as a tool for predicting genetic relatedness;Coleman;J. Mol. Evol.,1997
4. Confidence limits on phylogenies;Felsenstein;an approach using bootstrap,1985