George David Birkhoff, by R. E. Langer. George David Birkhoff and his mathematical work, by M. Morse. George David Birkhoff, by O. Veblen. Boundary value problems and associated Sturmian problems. Differential equations. Difference equations. Dynamics
Collected Mathematical Papers: George David Birkhoff, by R. E. Langer. George David Birkhoff and his mathematical work, by M. Morse. Geroge David Birkhoff, by O. Veblen. Boundary value problems and associated Sturmian problems. Differential equations. Difference equations. Dynamics
Collected Mathematical Papers: George David Birkhoff, by R. E. Langer. George David Birkhoff and his mathematical work, by M. Morse. Geroge David Birkhoff, by O. Veblen. Boundary value problems and associated Sturmian problems. Differential equations. Difference equations. Dynamics
The four color problem. Miscellaneous papers. The publications of George David Birkhoff, 1904-1946 (p.883-897)
Collected Mathematical Papers: The four color problem. Miscellaneous papers. The publications of George David Birkhoff, 1904-1946 (p. 883-897)
Relativity and Modern Physics , by George David Birkhoff ... with the Coöperation of Rudolph Ernest Langer ...