@inbook{1106705718, author={Francesca Gotsch and Laura Cruciani and Fabio Ghezzi and Giovanna Ogge' and Lami Yeo and Roberto J. Romero}, editor={Fleischer, Arthur C. and Toy, Eugene C. and Lee, Wesley and Manning, Frank A. and Romero, Roberto J.}, title={DOPPLER INTERROGATION OF THE FETAL CIRCULATION}, booktitle={Sonography in Obstetrics and Gynecology: Principles & Practice, 7e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2015}, url={obgyn.mhmedical.com/content.aspx?aid=1106705718} }