David Beech, Michael Marcotty. Unfurling the PL/I standard. SIGPLAN Notices, 8(10):12-43, 1973. [doi]
@article{BeechM73,
title = {Unfurling the PL/I standard},
author = {David Beech and Michael Marcotty},
year = {1973},
doi = {10.1145/987012.987014},
url = {https://doi.org/10.1145/987012.987014},
researchr = {https://researchr.org/publication/BeechM73},
cites = {0},
citedby = {0},
journal = {SIGPLAN Notices},
volume = {8},
number = {10},
pages = {12-43},
}