@article{ZNSL_1997_244_a15,
     author = {Ya. Yu. Nikitin and N. A. Stepanova},
     title = {A generalization of {Kendall's} tau and asymptotic efficiency of the corresponding test of independence},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {227--237},
     publisher = {mathdoc},
     volume = {244},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1997_244_a15/}
}