I. Heer

Analysis of Factors Influencing the Ultrasonic Fetal Weight Estimation

S. Müller-Egloff, A. Strauss, C. Kümper, 2008, Fetal Diagnosis and Therapy.

Routine cervical cerclage in higher order multiple gestation -- does it prolong the pregnancy?

P. Hillemanns, U. Janssen, C. Dannecker, 2002, Twin research : the official journal of the International Society for Twin Studies.

12th Fetal Cell Workshop

P. Hufnagl, J. Foidart, M. Dietel, 2001, Fetal Diagnosis and Therapy.

Routine Cervical Cerclage in Higher Order Multiple Gestation — Does It Prolong the Pregnancy?

P. Hillemanns, U. Janssen, C. Dannecker, 2002, Twin Research.

Sonographic Cervical Volumetry in Higher Order Multiple Gestation

P. Hillemanns, H. Hepp, U. Janssen, 2001, Fetal Diagnosis and Therapy.