1. No language but a cry;Lester,1992
2. The infant cry. A spectrographic and auditory analysis;Wasz-Höckert;Clin. Dev. Med.,1968
3. Cry analyses of symptomless low birth weight neonates and of asphyxiated newborn infants;Michelsson;Acta Paediatr. Scand. Suppl.,1971
4. Sound-spectrographic cry analysis of normal and abnormal newborn infants;Sirviö;Folia Phoniatr.,1976
5. The value of cry analysis in neonatology and early infancy;Michelsson,1980