Brad A. Myers. The user interface for Sapphire. IEEE Computer Graphics and Applications, 4(12):13-23, 1984. [doi]
@article{Myers84e, title = {The user interface for Sapphire}, author = {Brad A. Myers}, year = {1984}, doi = {10.1109/MCG.1984.6429376}, url = {http://dx.doi.org/10.1109/MCG.1984.6429376}, researchr = {https://researchr.org/publication/Myers84e}, cites = {0}, citedby = {0}, journal = {IEEE Computer Graphics and Applications}, volume = {4}, number = {12}, pages = {13-23}, }