@article{MET_1996__44_3_176693,
     author = {Herbert Vogt},
     title = {The {Average} {Number} of {Events} {Per} {Time} {Unit} and its {Estimation.}},
     journal = {Metrika},
     pages = {207--222},
     year = {1996},
     volume = {44},
     number = {3},
     zbl = {0866.62053},
     url = {http://geodesic.mathdoc.fr/item/MET_1996__44_3_176693/}
}