[Potentials of the ultrasonic method in diagnosing cervical incompetence in pregnancy].

@article{Penev1983PotentialsOT,
  title={[Potentials of the ultrasonic method in diagnosing cervical incompetence in pregnancy].},
  author={Irena Penev and S Krutilin},
  journal={Akusherstvo i ginekologiia},
  year={1983},
  volume={22 1},
  pages={41-5}
}