Drago Bokal. On the crossing numbers of Cartesian products with trees. Journal of Graph Theory, 56(4):287-300, 2007. [doi]
@article{Bokal07, title = {On the crossing numbers of Cartesian products with trees}, author = {Drago Bokal}, year = {2007}, doi = {10.1002/jgt.20258}, url = {http://dx.doi.org/10.1002/jgt.20258}, researchr = {https://researchr.org/publication/Bokal07}, cites = {0}, citedby = {0}, journal = {Journal of Graph Theory}, volume = {56}, number = {4}, pages = {287-300}, }