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2. Some aspects of non-linear reactor dynamics
3. Kinetics of the Circulating‐Fuel Nuclear Reactor
4. N. MINORSKY, “Introduction to Non-Linear Mechanics.” J. W. Edwards, Ann Arbor, 1947.
5. N. W. MCLACHLAN, “Ordinary Non-Linear Differential Equation.” Oxford Univ. Press, London and New York, 1956.