Brown, J. W., Churchill, R. V., Churchill, R. V., Churchill, R. V. 1., & Churchill, R. V. (1993). Fourier series and boundary value problems (5th ed.). New York: McGraw-Hill.

Brown, James Ward., Ruel Vance Churchill, Ruel Vance Churchill, Ruel Vance 1899- Churchill, and Ruel V. Churchill. Fourier Series and Boundary Value Problems. 5th ed. New York: McGraw-Hill, 1993.

Brown, James Ward., et al. Fourier Series and Boundary Value Problems. 5th ed. New York: McGraw-Hill, 1993.