That is a reference:
"An Analysis of Anonymity in Bitcoin Using P2P Network Traffic"
written by:
Philip Koshy, Diana Koshy, and Patrick McDaniel
Pennsylvania State University, University Park, PA 16802, USA
I see nowhere that the Veilcoin team says they wrote it or that it is supposed to be a Veilcoin whitepaper.
I think that it's the same whitepaper which used by RAZORcoin because this coins use the same TOR-anonymous technology