@proceedings {1854115,
	title = {From problem solving to the teaching of algebra: the genesis of the algebra textbook},
	journal = {11th international IHPST and 6th Greek history, philosophy and science teaching joint conference, Proceedings},
	year = {2011},
	pages = {344-347},
	publisher = {Epikentro Publications},
	isbn = {9789604583256},
	author = {Heeffer, Albrecht},
	editor = {Seroglou, Fanny and Koulountzos, Vassilis and Siatras, Anastasios}
}
