Paolo Sibani J. C. Schön Measuring the Local Geometry of Valleys in Complex Energy Landscapes by Exhaustive Exploration: The Lid Method. 62-75 2002 conf/para/2002 PARA http://link.springer.de/link/service/series/0558/bibs/2367/23670062.htm db/conf/para/para2002.html#SibaniS02