@phdthesis{Vollert2001,
author = {Vollert, Hans-Walter},
year = {2001},
title = {Diagnostic and Clinical Value of Doppler Sonography of the Uterine Arteries at
20 - 23 Weeks of Gestation in a Low Risk Population},
type = {Dissertation},
url = "http://dx.doi.org/10.17169/refubium-9869",
}