VOL.15 NO.2 JUNE 1998

• Ikeda, H.: ``Existence and Stability of Pulse Waves Bifurcated from Front and Back Waves in Bistable Reaction-Diffusion Systems,'' p.163-
• Iida, M., Muramatsu, T., Ninomiya, H., and Yanagida, E.: ``Diffusion-Induced Extinction of a Superior Species in a Competition System,'' p.233-
• Ohnishi, I. and Nishiura, Y.: ``Spectral Comparison between the Second and the Fourth Order Equations of Conservative Type with Non-local Terms,'' p.253-
• Ohi, F. and Shinmori, S.: ``A Definition of Generalized k-out-of-n Multistate Systems and Their Structural and Probabilistic Properties,'' p.263-
• Ali, Z., Shinohara, Y., Imai, H., Sakaguchi, H., and Okamoto, K.: ``Existence and Uniqueness of Quasiperiodic Solutions to Perturbed Nonlinear Oscillators,'' p.279-
• Petkovic, M.S., Trickovic, S., and Herceg, D.: ``On Euler-like Methods for the Simultaneous Approximation of Polynomial Zeros,'' p.295-
• Ikota, R., Ishimura, N., and Yamaguchi, T.: ``On the Structure of Steady Solutions for the Kinematic Model of Spiral Waves in Excitable Media,'' p.317-