Facile 3D direct manipulation. - Dan Venolia (INTERCHI, 1993)

T-cube: a fast, self-disclosing pen-based alphabet. - Dan Venolia; Forrest Neiberg (CHI Conference Companion, 1994)

Why is 3-D interaction so hard and what can we really do about it? - Julian E. Gómez; Rikk Carey; Tony Fields; Andries van Dam; Dan Venolia (SIGGRAPH, 1994)

Look Ma! four hands! new models for interacting with 3D environments. - Julian E. Gómez; Dan Mapes; Henry Sowizral; Andries van Dam; Dan Venolia (SIGGRAPH Abstracts and Applications, 1998)