@inbook{Ridder1984,
author = {Ridder, G.},
title= {The Distribution of Single-Spell Duration Data},
year = {1984},
doi = {10.1007/978-3-642-88315-6_3},
editor = {Neumann, G.R.},
editor = {Westergård-Nielsen, N.C.},
booktitle = {Studies in Labor Market Dynamics},
address = {Berlin},
publisher = {Springer},
pages = {45--73},
}