@article {18383,
	title = {Effects of structured programming on PL/I programmers},
	journal = {Software: Practice and Experience},
	volume = {7},
	year = {1977},
	month = {1977///},
	pages = {793 - 795},
	abstract = {A PL/I system has been implemented which automatically collects and saves information on every program compiled and executed. This note describes some of the analysis that has been performed on approximately 9,000 of these collected programs.},
	doi = {10.1002/spe.4380070613},
	author = {Zelkowitz, Marvin V}
}
