The valve location problem. - Hans L. Bodlaender; Alexander Grigoriev; Nadejda V. Grigorieva; Albert Hendriks (CTW, 2007)

The Valve Location Problem in Simple Network Topologies. - Hans L. Bodlaender; Albert Hendriks; Alexander Grigoriev; Nadejda V. Grigorieva (INFORMS J. Comput., 2010)