Really nice paper on floating point
@article{103163,
author = {David Goldberg},
title = {What every computer scientist should know about floating-point arithmetic},
journal = {ACM Comput. Surv.},
volume = {23},
number = {1},
year = {1991},
issn = {0360-0300},
pages = {5--48},
doi = {http://doi.acm.org/10.1145/103162.103163},
publisher = {ACM Press},
address = {New York, NY, USA},
}