Course in Mathematical Analysis Volume 3Edouard Goursat, Howard G. Bergmann · First published 2014Open the Tome
Integral Equations, Calculus of VariationsGoursat, Edouard) Bergmann, Howard G. (trans) · First published 1964Open the Tome
The boundary layer problem for certain non-linear ordinary differential equationsHoward G. Bergmann · First published 1951Open the Tome
