@inbook{1138378051, author={Ilan E. Timor-Tritsch and Ana Monteagudo and Gianluigi Pilu and Gustavo Malinger}, title={Preface to the Third Edition}, booktitle={Ultrasonography of the Prenatal Brain, 3e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2017}, url={obgyn.mhmedical.com/content.aspx?aid=1138378051} }