@article{MaherMurray2016, author = {Stephen J. Maher and John M. Murray}, title = {The unrooted set covering connected subgraph problem differentiating between HIV envelope sequences}, journal = {European Journal of Operational Research}, volume = {248}, number = {2}, pages = {668 -- 680}, doi = {doi:10.1016/j.ejor.2015.07.011}, year = {2016}, }