Robert M. Howe, Elmer G. Gilbert. Trigonometric Resolution in Analog Computers by Means of Multiplier Elements. IEEE Transactions on Computers, 6(2):86-92, 1957. [doi]
@article{HoweG57,
title = {Trigonometric Resolution in Analog Computers by Means of Multiplier Elements},
author = {Robert M. Howe and Elmer G. Gilbert},
year = {1957},
doi = {10.1109/TEC.1957.5221576},
url = {http://dx.doi.org/10.1109/TEC.1957.5221576},
researchr = {https://researchr.org/publication/HoweG57},
cites = {0},
citedby = {0},
journal = {IEEE Transactions on Computers},
volume = {6},
number = {2},
pages = {86-92},
}