References
- Bakketeig L. S., Eikhom S. N., Bergsjø P. Duration of labour starting spontaneously. (In Norwegian.) Tidsskr Nor Laegeforen 1977; 95: 442
- Bakketeig L. S., Bjerkedal T. Birth during transportation. (In Norwegian.) Tidsskr Nor Laegeforen 1974; 94: 2306
- Bergsjø P., Bakketeig L. S., Bjerkedal T. Birth registration by partogram. (In Norwegian.) Tidsskr Nor Laegeforen 1977; 95: 439
- Bjøro K., Molne K. Propedeutisk obstetrikk. Universitetsforlaget, Oslo 1972
- Brody S. Obstetrik og gynekologi. Almqvist & Wiksell, Stockholm 1970
- Døring G. K., Krauss V. Über die Bedeutung der Geburtsdauer für das Kind. Geburtshiefe Frauen-heilk 1967; 27: 1185
- Friedman E. A. Labour. Clinical Evaluation and Management. Appelton-Century-Crofts. Division of Meredith Publishing Company, New York 1967
- Larsen J. F., Asbjørn P., Schmidt T. Obs-tetrik/gynaekologi. Munksgaard, København 1974
- Niswander K. R., Gordon M. The Women and Their Pregnancies. U.S. Department of Health, Education and Welfare Publication No. (NIH), Washington, D.C. 1972; 73–379
- Studd J. Partograms and Nomograms of Cervical Dilatation in Management of Primigravid Labout. Br Med J 1973; 4: 451