POSITIVELY STABLE DYNAMICAL SYSTEMS**This research was partially supported by the National Science Foundation under Grant No. NSF-GP-27284.
1972 ◽
pp. 365-370
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2016 ◽
Vol 49
(18)
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pp. 1030-1035
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2000 ◽
Vol 59
(4)
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pp. 272-290
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1985 ◽
Vol 40
(2)
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pp. 148-154
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