International Conference on Nonlinear Functional Analysis and Applications Kyongsang Taehakkyo and Kyongnam Taehakkyo, Cho, Y. J., Kim, J. K., & Sik Ha, K. (2004). Contemporary differential equations and applications. Nova Science Publishers.

International Conference on Nonlinear Functional Analysis and Applications Kyongsang Taehakkyo and Kyongnam Taehakkyo, Yeol Je Cho, Jong Kyu Kim, and Ki Sik Ha. Contemporary Differential Equations and Applications. New York: Nova Science Publishers, 2004.

International Conference on Nonlinear Functional Analysis and Applications Kyongsang Taehakkyo and Kyongnam Taehakkyo, et al. Contemporary Differential Equations and Applications. Nova Science Publishers, 2004.