1) Prechtl H F R, Fargel J W, Weinmann H M, Bakker H H. Posture, motility and respiration in low-risk preterm infants. Dev Med Child Neurol 1979; 21: 3-27.
2) Cioni G, Prechtl H F R. Preterm and early postterm motor behaviour in low- risk premature infants. Early Hum Dev 1990; 23: 159-92.
3) Ferrari F, Cioni G, Prechtl H F R. Qualitative changes of general movements in preterm infants with brain lesions. Early Hum Dev 1990; 23: 193-231.
4) Dubowitz L M S, Dubowitz V. The neurological assessment of the preterm and fullterm newborn infant. Clinics in developmental medicine. No 79. London: Heineman, 1981.
5) Amiel-Tison C. Neurological evolution of the maturity of newborn infants. Arch Dis Child 1968; 43: 89-93.