CrapoRO, MorrisAH, GardnerRM. Reference spirometric values using techniques and equipment that meet ATS recommendations. Am Rev Respir Dis1981;123(6):659–664.
2.
Turner-WarwickM, BurrowsB, JohnsonA.Cryptogenic fibrosing alveolitis: clinical features and their influence on survival. Thorax1980;35(3):171–180.
3.
RiesAL. Measurement of lung volumes (review). Clin Chest Med1989;10(2):177–186.
4.
BatesDV. Respiratory function in disease. Philadelphia: WB Saunders; 1989: 272–282.