Carlos Eduardo Ferreira, Fernando M. de Oliveira Filho. Some Formulations for the Group Steiner Tree Problem. Electronic Notes in Discrete Mathematics, 18:127-132, 2004. [doi]
@article{FerreiraF04,
title = {Some Formulations for the Group Steiner Tree Problem},
author = {Carlos Eduardo Ferreira and Fernando M. de Oliveira Filho},
year = {2004},
doi = {10.1016/j.endm.2004.06.020},
url = {http://dx.doi.org/10.1016/j.endm.2004.06.020},
researchr = {https://researchr.org/publication/FerreiraF04},
cites = {0},
citedby = {0},
journal = {Electronic Notes in Discrete Mathematics},
volume = {18},
pages = {127-132},
}