A Multimodal Interaction Scheme between a Blind User and the Tyflos Assistive Prototype. - Nikolaos G. Bourbakis; Robert Keefer; Dimitrios Dakopoulos; Anna Esposito (ICTAI (2), 2008)

An Interaction Based Approach to Document Segmentation for the Visually Impaired. - Robert Keefer; Dimitris Dakapoulos; Anna Esposito; Nikolaos G. Bourbakis (HCI (7), 2009)

Interaction with a Mobile Reader for the Visually Impaired. - Robert Keefer; Nikolaos G. Bourbakis (ICTAI, 2009)

A Wearable Document Reader for the Visually Impaired: Dewarping and Segmentation. - Robert Keefer; Praveen K. Kakumanu; Nikolaos G. Bourbakis (Int. J. Artif. Intell. Tools, 2009)

Voice commands for a mobile reading device for the visually impaired. - Robert Keefer; Sundaram Narayanan; Nikolaos G. Bourbakis (PETRA, 2010)

The Development and Evaluation of an Eyes-Free Interaction Model for Mobile Reading Devices. - Robert Keefer; Yan Liu; Nikolaos G. Bourbakis (IEEE Trans. Hum. Mach. Syst., 2013)

From Image to XML: Monitoring a Page Layout Analysis Approach for the Visually Impaired. - Robert Keefer; Nikolaos G. Bourbakis (Int. J. Monit. Surveillance Technol. Res., 2014)

A Survey on Document Image Processing Methods Useful for Assistive Technology for the Blind. - Robert Keefer; Nikolaos G. Bourbakis (Int. J. Image Graph., 2015)

Intentional and Responsible: Incorporating Social Values Into the Design Process. - Robert Keefer; Nadav Zohar; Lisa J. Douglas (Int. J. Technoethics, 2024)