1. Virologic and serologic studies on human products of conception after maternal rubella;Alford;New England J. Med.,1964
2. Twin birth—identical or fraternal twins?;Allen;Obst. & Gynec.,1971
3. Twin placenta in perinatal mortality;Benirschke;New York J. Med.,1961
4. The Future of Perinatal Physiopathology;Benirschke,1971
5. The Pathology of the Human Placenta;Benirschke,1967