Outcome of a MEDLINE search under the keywords“reference equations” and “diffusing capacity” or “diffusion”
| First author | Year | Country/area/nature of study | Journal |
| Neve | 2002 | France; puberty and thoracic volume index | Eur Respir J 2002; 20: 1292–1298 |
| Zheng | 2002 | China; survey on clinical application | Zhonghua Jie He He Hu Xi Za Zhi 2002; 25: 69–73 (Chinese) |
| Zanen | 2001 | The Netherlands; alveolar membrane diffusion capacity and pulmonary capillary blood volume | Eur Respir J 2001; 18: 764–769 |
| Cotes | 2001 | UK workers; body mass index | Thorax 2001; 56: 839–844 |
| Hughes | 2001 | UK; in defence of KCO (TL/VA) | Eur Respir J 2001; 17: 168–174 |
| Johnson | 2000 | USA; correction for VA for both DL,CO and KCO | Respir Med 2000; 94: 28–37 |
| Neder | 1999 | Brazil | Braz J Med Biol Res 1999; 32: 729–737 |
| Baur | 1999 | Germany; comparison of lung function reference values | Int Arch Occup Environ Health 1999; 72: 69–83 |
| Martin | 1998 | Canada/Québec | Rev Mal Respir 1998; 15: 781–788 (French) |
| Mahajan | 1997 | India; healthy females of Haryana | Indian J Chest Dis Allied Sci 1997; 39: 163–171 |
| Chin | 1997 | Singapore; nonsmoking adults | Respirology 1997; 2: 143–149 |
| Guenard | 1996 | France; elderly subjects | Eur Respir J 1996; 9: 2573–2577 |
| Collard | 1996 | Belgium; obstructive sleep apnoea and obesity | Chest 1996; 110: 1189–1193 |
| Chinn | 1996 | UK workers; standardised for alveolar volume | Eur Respir J 1996; 9: 1269–1277 |
| Stam | 1996 | The Netherlands; at reduced alveolar volumes in children | Pediatr Pulmonol 1996; 21: 84–89 |
KCO: transfer coefficient of the lung for carbon monoxide; TL: transfer factor of the lung; VA: alveolar volume; DL,CO: carbon monoxide diffusing capacity.