The best reference may be Dr. Thomas Levy's STOP AMERICA'S #1 KILLER. Dr. Levy clearly explains how weakness in the arterial wall leads to deposits of various kinds, cholesterol and calcium among them, depending to some extent on what is available to shore up the arterial wall. (The Pauling/Rath theory is that if we have sufficient collagen to keep the arterial walls strong, as is normal in most species which make their own vitamin C 24/7, then the atherosclerotic processes that Levy describes does not occur.)
Dr. Bush also describes the white soft atheromas which are the first to appear in the retinal arteries, and that later, the evidence of calcifications appear. I would predict that a person on a rat-poison style blood thinner would rapidly develop calcifications, for reasons of vitamin K antagonism discussed regularly on this forum.
My problem with a statement that either calcium or cholesterol "CAUSE" atherosclerosis is that these are not causes of the problem, the lack of vitamin C is the cause, but these (cholesterol and calcium) are tools the body uses in an attempt to repair arteries that are weakening.
This idea that a large part of the problem is due to calcium is hard for me to fathom, other than perhaps doctors put most heart patients on rat-poison style blood thinners.