@article{1177730889,
author = {Wald, Abraham},
title = {Differentiation Under the Expectation Sign in the Fundamental Identity of Sequential Analysis},
journal = {Ann. Math. Statist.},
volume = {17},
number = {4},
year = {1946},
pages = { 493-497},
language = {en},
url = {http://dml.mathdoc.fr/item/1177730889}
}
Wald, Abraham. Differentiation Under the Expectation Sign in the Fundamental Identity of Sequential Analysis. Ann. Math. Statist., Tome 17 (1946) no. 4, pp. 493-497. http://gdmltest.u-ga.fr/item/1177730889/