Thanks, I had not seen that dissertation yet, it has much more information than that arxiv link - here is a a pdf of that dissertation that google gave me: http

Thanks, I had not seen that dissertation yet, it has much more information than that arxiv link - here is a a pdf of that dissertation that google gave me: https://www.illc.uva.nl/Research/Publications/Dissertations/DS-2007-01.text.pdf https://www.illc.uva.nl/Research/Publications/Dissertations/... Although strictly speaking the idea with the evolutionary trees is a bit older, as far as I know it is from https://arxiv.org/pdf/cs/0111054.pdf https://arxiv.org/pdf/cs/0111054.pdf