Robert Sablatnig Christian Menard On Estimating the Position of Fragments on Rotational Symmetric Pottery. 455-462 1999 conf/3dim/1999 3DIM http://csdl.computer.org/comp/proceedings/3dim/1999/0062/00/00620455abs.htm db/conf/3dim/3dim1999.html#SablatnigM99