Modifying Networks to Obtain Low Cost Trees. - Sven Oliver Krumke; Hartmut Noltemeier; Madhav V. Marathe; S. S. Ravi; Kay U. Drangmeister (WG, 1996)

Modifying Edges of a Network to Obtain Short Subgraphs. - Kay U. Drangmeister; Sven Oliver Krumke; Madhav V. Marathe; Hartmut Noltemeier; S. S. Ravi (Theor. Comput. Sci., 1998)