1. Becklage, M. R., Goldman, H. I., Bosman, A. R., Fred, C. C.: Long-term effects of exposure to nitrous fumes. Amer. Rev. Tuberc.76, 398 (1957).
2. Blair, W. H., Henry, M. C., Ehrlich, R.: Chronic toxicity of nitrogen dioxide. II. Effect on histopathology of lung tissue. Arch. environm. Hlth.18, 186 (1969).
3. Bokhoven, C., Niessen, H. J.: Amounts of oxides of nitrogen and carbon monoxide in cigarette smoke, with and without inhalation. Nature (Lond.)192, 458 (1961).
4. Buckley, R. D., Loosli, C. G.: Effects of nitrogen dioxide on germ-free mouse lung. Arch. environm. Hlth.18, 588 (1969).
5. Buell, G. C., Tokiwa, Y., Mueller, P. K.: Lung collagen and elastin denaturation in vivo following inhalation of nitrogen dioxide. 59th Annual Air Pollution Control Association Meeting, San Francisco, California, June, 1966.