Frédéric Havet, Marc Wennink. The Push Tree problem. Networks, 44(4):281-291, 2004. [doi]
@article{HavetW04, title = {The Push Tree problem}, author = {Frédéric Havet and Marc Wennink}, year = {2004}, doi = {10.1002/net.20038}, url = {http://dx.doi.org/10.1002/net.20038}, researchr = {https://researchr.org/publication/HavetW04}, cites = {0}, citedby = {0}, journal = {Networks}, volume = {44}, number = {4}, pages = {281-291}, }