@inproceedings{sutherland,
author = {Sutherland, Ivan E.},
title = {Sketchpad a man-machine graphical communication system},
booktitle = {25 years of DAC: Papers on Twenty-five years of electronic design automation},
year = {1988},
isbn = {0-89791-267-5},
pages = {507--524},
doi = {http://doi.acm.org/10.1145/62882.62943},
publisher = {ACM},
address = {New York, NY, USA},
}
$$
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$$