- Introduction to Cladistics - Cladistics is a particular method of hypothesizing relationships among organisms based on the idea that members of a group share a common evolutionary history.
- Phylogenetics Methodology - Introduction to various phylogenetic statistical methodologies.
- Understanding Cladistics - Short introduction from the American Museum of Natural History.
- What is Cladistics? - The methods and terminology of phylogenetic systematics explained by the magazine Fossil News.
- Willi Hennig Society - Society of scientists studying cladistics.
