@inbook{5ef05bb8673f45c0b2d71ad0debbd7be,
title = "Sleep quality and diurnal motor activity pattern in healthy adults: effects of age and sex",
author = "Volkers, {AC (A.)} and Joke Tulen and M Gieteling and {Wegewijs- de Jong}, M and {van den Broek}, W.W.",
year = "1997",
language = "Undefined/Unknown",
isbn = "9073675081",
pages = "119--124",
editor = "D.G.M. Beersma and J.B.A.M. Arends and {van Bemmel}, A.L. and W.F. Hofman and G.S.F. Ruigt",
booktitle = "Sleep-wake, research in The Netherlands",
}