Design , p.137-42. Computers in Engineering Conf. , San Francisco CA, pp 43-47. Aided Design , Vol. Some STEP software vendors also distribute newsletters. An index of PDI articles is available free of charge in digital or paper form.
Some articles are available online .
Local List of some STEP Parts and APs . The below references relate directly to specific STEP Parts. Subsections are organized roughly by Series and Parts. This is updated a couple of times a year. Shah J.J. and Mathew A. 1991.