1. Collaborative European Multicenter Study Group. Surfactant replacement therapy for severe neonatal respiratory distress syndrome: an international randomized clinical trial. Pediatrics 1988; 82: 683–91.
2. Bevilacqua, G., Cosmi, E. V., Volante, E., Parmigiani, S., Monici, P., Gaioni, L. et al. Surfactant substitution in RDS; early versus late treatment. In: Speer, C. P. and Robertson, B., eds. Proceedings of the 4th Workshop on Surfactant Replacement (Hardenburg), Gottingen: University of Gottingen, 1989.
3. Bossi, E., Koerner, F., Flury, B. and Zulauf, M. Retinopathy of prematurity: a risk factor analysis with univariate and multivariate statistics. Helv Paediatr Acta 1984; 39: 307–17.
4. Valdes-Dapena, M. Iatrogenic disease in the perinatal period. Pediatr Clin North Am 1989; 36: 67–93.