@conference {678587,
	title = {On the Nature and Origin of Algebraic Symbolism},
	booktitle = {New Perspectives on Mathematical Practices. Essays in Philosophy and History of Mathematics.},
	year = {2009},
	publisher = {World Scientific Publishing},
	organization = {World Scientific Publishing},
	isbn = {978-981-281-222-3},
	url = {http://www.worldscibooks.com/etextbook/6810/6810\_chap01.pdf},
	author = {Heeffer, Albrecht},
	editor = {Van Kerkhove, Bart}
}
