2. http://www.physio-pedia.com/Muscles_of_Respiration
3. none
4. https://www.verywell.com/forced-expiratory-capacity-measurement-914900
5. https://www.sciencedirect.com/topics/medicine-and-dentistry/inspiratory-reserve-volume
6. http://medical-dictionary.thefreedictionary.com/functional+residual+capacity
7. http://www.merriam-webster.com/medical/residual%20volume
9. none
10. none
11. https://prohealthinsight.com/diseases-and-conditions/respiratory-disease/types-causes-restrictive-lung-disease/
12. none
13. none
14. http://emedicine.medscape.com/article/296301-overview
15. none
16. none
17. none
18. http://emedicine.medscape.com/article/1938228-overview
19. http://emedicine.medscape.com/article/1938228-overview
20. http://emedicine.medscape.com/article/1938228-overview#aw2aab6b2b2aa
21. none
22. none
23. none
24. none
25. none
26. http://www.ncbi.nlm.nih.gov/pubmed/20550071
27. none