@article{bonham_titus_beichner_martin_2000, title={Education research using web-based assessment systems}, volume={33}, DOI={10.1080/08886504.2000.10782298}, number={1}, journal={Journal of Research on Computing in Education}, author={Bonham, S. and Titus, A. and Beichner, Robert and Martin, L.}, year={2000}, pages={28–45} }
 @article{christian_titus_1998, title={Developing web-based curricula using Java physlets}, volume={12}, DOI={10.1063/1.168666}, number={3}, journal={Computers in Physics}, author={Christian, W. and Titus, A.}, year={1998}, pages={227–232} }