1. The serial organisation of sucking in the young infant;Wolff;Pediatrics,1968
2. Nutritive and non-nutritive sucking in preterm infants;Daniels;J Dev Physiol,1986
3. The interaction of state and non-nutritive sucking;Wolff,1972
4. The emergence of fetal behaviour. I. Qualitative aspects;de Vries;Early Hum Dev,1982
5. Development of sucking rhythm in preterm infants;Hack;Early Hum Dev,1985