1. Goldsmith JP, Karotkin EH. Assisted ventilation of the neonate. 4th ed. Philadelphia: W. B. Saunders; 2003.
2. Mackenzie CF. Physiological changes following chest physiotherapy. In: Mackenzie CF, Ciesla N, Imle PC, editors. Chest physiotherapy in intensive care unit. 2nd ed. Baltimore: Williams & Wilkins; 1989. pp. 215–22.
3. Finer NN, Moriartey RR, Boyd J, Phillips HJ, Stewart AR, Ulan O. Postextubation atelectasis: a retrospective review and a prospective controlled study. J Pediatr. 1979;94:110.
4. Frownfelter DL, Dean E. Principles and practice of cardiopulmonary physical therapy. 3rd ed. Michigan: Mosby; 1987.
5. Reid L. Bronchopulmanary dysplasia—pathology. J Pediatr. 1979;95:836–41.