[1] T. Haga:
A two-sample rank test on location. Ann. Inst. Statist. Math. 11 (1959/60), 211 - 219.
MR 0119315
[2] J. Hájek Z. Šidák:
Theory of rank tests. Academia, Prague & Academic Press, New York - London, 1967.
MR 0229351
[3] Z. Šidák:
Tables for the two-sample location E-test based on exceeding observations. Apl. mat. 22 (1977), 166-175.
MR 0440791