@article{RehfeldtFranzKoch2022, author = {Daniel Rehfeldt and Henriette Franz and Thorsten Koch}, title = {Optimal Connected Subgraphs: Integer Programming Formulations and Polyhedra}, journal = {Networks}, volume = {80}, number = {3}, pages = {314 -- 332}, doi = {10.1002/net.22101}, year = {2022}, }