Hi, I am afraid that once these papers are published, we no longer have the copyright to it (I know it's weird but that is how academic papers work ...). So they are all on IEEE servers or some other journals. The only thing I could find is a link to some slides for a talk at the NUSOD conference but it is short on details. I have not used cite seer in nearly a decade since the advent of Google Scholar ... We do use geometric optics for this with a few exceptions (i.e. anti-reflection coatings used to increase extraction efficiency use a multi-layer plane wave transfer matrix method to get an effective reflection coefficient). But this is getting a bit off-topic so back on to the code ... The only reason I thought the list would tolerate this was general interest in optimization problems and literature sources. Everyone seems to want to use threads and ignore algorithmic issues that may provide ideas for library code. Certainly not boost specific but could develop into something. Considering a few real examples may be interesting by itself. Sent from my Verizon Wireless BlackBerry