@article{grazzini_maria_2004, title = {Maria {Montessori} and {Algebra}: {The} {Binomial} {Theorem}}, volume = {29}, url = {http://www.worldcat.org/oclc/11228546}, language = {eng}, number = {1}, journal = {NAMTA Journal}, author = {Grazzini, Camillo}, year = {2004}, pages = {79--93} }