Michael J. Wester, Stanly L. Steinberg. An extension to MACSYMA's concept of functional differentiation. ACM Comm. Computer Algebra, 17(3-4):25-30, 1983. [doi]
@article{WesterS83,
title = {An extension to MACSYMA's concept of functional differentiation},
author = {Michael J. Wester and Stanly L. Steinberg},
year = {1983},
doi = {10.1145/1089338.1089343},
url = {http://doi.acm.org/10.1145/1089338.1089343},
researchr = {https://researchr.org/publication/WesterS83},
cites = {0},
citedby = {0},
journal = {ACM Comm. Computer Algebra},
volume = {17},
number = {3-4},
pages = {25-30},
}