@other{https://resolver.caltech.edu/CaltechETD:etd-11242008-082928, title = "A Study of Flutter in One Degree of Freedom", year = "1942", url = "https://resolver.caltech.edu/CaltechETD:etd-11242008-082928", id = "record", doi = "10.7907/NX9K-JT57" } @other{https://resolver.caltech.edu/CaltechETD:etd-11062008-151722, title = "The Effect of Gunfire on the Longitudinal Motion of an Airplane", year = "1941", url = "https://resolver.caltech.edu/CaltechETD:etd-11062008-151722", id = "record", doi = "10.7907/GQG7-6C62" }