Veli Mäkinen Gonzalo Navarro Esko Ukkonen Approximate Matching of Run-Length Compressed Strings. 31-49 2001 conf/cpm/2001 CPM http://link.springer.de/link/service/series/0558/bibs/2089/20890031.htm db/conf/cpm/cpm2001.html#MakinenNU01