If n independent observations, categorized according to three schemes with two categories in each scheme, have been taken, it is customary to summarize the data in a 2 x 2 x 2 contingency table (...)
@article{urn:eudml:doc:39848, title = {An exact procedure for 2 x 2 x 2 contingency tables.}, journal = {Stochastica}, volume = {2}, year = {1978}, pages = {73-75}, zbl = {0416.62044}, mrnumber = {MR0562435}, language = {en}, url = {http://dml.mathdoc.fr/item/urn:eudml:doc:39848} }
Heilmann, Wolf-Rüdiger. An exact procedure for 2 x 2 x 2 contingency tables.. Stochastica, Tome 2 (1978) pp. 73-75. http://gdmltest.u-ga.fr/item/urn:eudml:doc:39848/