Kressly, Arthur E.; Parker, Anthony C. (1995). "Development of the McDonnell Douglas MD-90". Section 1: Journal of aerospace. SAE Technical Paper Series. Vol. 104. SAE International. pp. 1612–1623. doi:10.4271/952052. JSTOR44612076. {{cite book}}: |work= ignored (help)
Kressly, Arthur E.; Parker, Anthony C. (1995). "Development of the McDonnell Douglas MD-90". Section 1: Journal of aerospace. SAE Technical Paper Series. Vol. 104. SAE International. pp. 1612–1623. doi:10.4271/952052. JSTOR44612076. {{cite book}}: |work= ignored (help)