(1) AMBROSINI, G.C., et al.: Stability analysis and dynamic performance of a chemical system operated for the automatic fine control of a nuclear reactor, Proc. 3rd Geneve Conf., Vol. 4, 118~127 (1964).
(2) HU, C.L., HAN, K.W.: Stability analysis of a nuclear reactor control system with multiple transport lags, IEEE Trans. Nucl. Sci., NS-20[2], 83~93 (1973).
(3) A1, C.H., HAN, K.W.: Stability analysis of a nuclear reactor control system with multiple transport-lags and an asymmetrical nonlinearity, ibid., NS-22[5], 2103~2112 (1975).
(4) TAKANO, M., OGAWA, Y.: Stability of a power reactor with multiple transport lags and non-linear characteristics of controller, J. Nucl. Sci. Technol., 13[8], 432~441 (1976).
(5) WILLEMS, J.L.: "Stability Theory of Dynamical Systems", p. 50 (1970), Thomas Nelson and Sons.