Neonatal periventricular leukomalacia: diagnosis and monitoring by real-time ultrasound / V. Váradi, I. György, L. Karmazsin
  Abstr. eng.
  In: Acta Paediatrica Hungarica. - ISSN 0231-441X. - 1990. 30. évf. 1. sz., p. 43-51.