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Hoyles, Celia and Sutherland, Rosamund (1992) Logo mathematics in the classroom (revised edition). Routledge, London. ISBN 0-415-07799-0
Sutherland, Rosamund and Noss, Richard and Hoyles, Celia (1990) The microworlds course: an approach to computer-based inservice teacher education for mathematics. In: Teaching and learning in Logo-based environments. Frontiers in Artificial Intelligence and Applications . IOS Press, Amsterdam, pp. 92-104. ISBN 9051990243