Validation of a keystroke-level model for a text entry system used by people with disabilities. - Heidi Horstmann Koester; Simon P. Levine (ASSETS, 1994)

Toward Goldilocks' pointing device: determining a "just right" gain setting for users with physical impairments. - Heidi Horstmann Koester; Edmund F. LoPresti; Richard C. Simpson (ASSETS, 2005)

Use of Scanning Wizard Can Enhance Text Entry Rate: Preliminary Results. - Heidi Horstmann Koester; Richard C. Simpson (AAATE Conf., 2017)