Ben J. A. Hulshof, J. A. van Hulzen. Some reduce facilities for pretty printing subscripts and formal derivatives. ACM Comm. Computer Algebra, 17(1):16-20, 1983. [doi]
@article{HulshofH83,
title = {Some reduce facilities for pretty printing subscripts and formal derivatives},
author = {Ben J. A. Hulshof and J. A. van Hulzen},
year = {1983},
doi = {10.1145/1089320.1089323},
url = {http://doi.acm.org/10.1145/1089320.1089323},
researchr = {https://researchr.org/publication/HulshofH83},
cites = {0},
citedby = {0},
journal = {ACM Comm. Computer Algebra},
volume = {17},
number = {1},
pages = {16-20},
}