BibTeX
@ARTICLE{
         Neidinger1989AAA,
       AUTHOR = "Neidinger, Richard D.",
       TITLE = "An {APL} Approach to Differential Calculus Yields a Powerful Tool",
       JOURNAL = "APL89 Conference Proceedings, APL Quote Quad",
       VOLUME = "19",
       YEAR = "1989",
       PAGES = "285--288"
}