Koji Nakano Stephan Olariu Albert Y. Zomaya A Time-Optimal Solution for the Path Cover Problem on Cographs. 26-30 1999 conf/ipps/1999 IPPS/SPDP http://computer.org/proceedings/ipps/0143/01430026abs.htm db/conf/ipps/ipps1999.html#NakanoOZ99