title: optics : ordering points to identify the clustering structure. authors: jörg sander , hans-peter kriegel , markus m. breunig , mihael ankerst. venue: sigmod conference. year: 1999.0
title: optics : ordering points to identify the clustering structure international conference on management of data. authors: mihael ankerst , markus m. breunig , hans-peter kriegel , j &#246; rg sander. venue: nan. year: 1999.0