David Callan, et al.. The Maximum Associativeness of Division: 11091. The American Mathematical Monthly, 113(5):462-463, 2006. [doi]
@article{Callana06, title = {The Maximum Associativeness of Division: 11091}, author = {David Callan and et al.}, year = {2006}, url = {http://www.jstor.org/stable/27641963}, researchr = {https://researchr.org/publication/Callana06}, cites = {0}, citedby = {0}, journal = {The American Mathematical Monthly}, volume = {113}, number = {5}, pages = {462-463}, }