Diagrammatic Spreadsheet: An Overview. - Truong Lan Le; Zenon Kulpa (Diagrams, 2004)

Visual Design and Reasoning with the Use of Hypergraph Transformations. - Ewa Grabska; Grazyna Maria Slusarczyk; Truong Lan Le (Electron. Commun. Eur. Assoc. Softw. Sci. Technol., 2008)