The Fundamental Design Variables of Diagramming. - Clive Richards (Diagrammatic Representation and Reasoning, 2002)

A Framework for Analyzing and Designing Diagrams and Graphics. - Yuri Engelhardt; Clive Richards (Diagrams, 2018)

The DNA Framework of Visualization. - Yuri Engelhardt; Clive Richards (Diagrams, 2020)

A Universal Grammar for Specifying Visualization Types. - Yuri Engelhardt; Clive Richards (Diagrams, 2021)

A Building-Block Approach to the Diversity of Visualization Types - Each Type Expressed Visually, and as a Systematically Generated Sentence. - Yuri Engelhardt; Clive Richards (Diagrams, 2024)