Math! Encounters with high school students , by Lang Serge . Pp 138. DM 68. 1985. ISBN 3-540-96129-1 (Springer)
@inproceedings{Green1987MathEW,
title={Math! Encounters with high school students , by Lang Serge . Pp 138. DM 68. 1985. ISBN 3-540-96129-1 (Springer)},
author={David R. Green and Serge Lang},
year={1987}
}