I have the second article link: http://www-math.ucdenver.edu/~wcherowi/courses/m6221/pglc1d.html It was ucdenver (the link had cudenver). Probably didn't work from the getgo. On Nov 20, 2013, at 11:43 AM, Hans Havermann <gladhobo at teksavvy.com> wrote: > Haven't found the second (Cherowitzo) link