Recently I commented on a question which was about tiling a 100 by 100 grid with a 1 x 8 square. (Actually to prove this was impossible.) One of our users posted a link to a very interesting looking paper on tiling problems as a comment, and I also commented, but now looking through my comments I can't find the post. I assume it was deleted. However, I really want to find this paper! I had planned on giving a talk about it next week. Is there any way for me to locate the question?