@Article{Mazurak2014,
journal="Prenatal Cardiology",
issn="2449-6723",
number="4",
year="2014",
title="TWINS. LESSONS FROM THE PAST",
author="Mazurak, Magdalena",
pages="19--22",
url="https://www.termedia.pl/TWINS-LESSONS-FROM-THE-PAST,146,43038,1,1.html"
}