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J. Bifurcation Chaos"],"published-print":{"date-parts":[[2016,6,30]]},"abstract":"<jats:p> To understand the complex dynamics of Kingni\u2013Jafari system with hidden attractors, the first objective of this paper is to study the global dynamics, and give a complete description of the dynamics of Kingni\u2013Jafari system at infinity by using the Poincar\u00e9 compactification of a polynomial vector field in [Formula: see text]. The second objective of this paper is to prove the existence of periodic solutions in the Kingni\u2013Jafari system by classical Hopf bifurcation and degenerate Hopf bifurcation. Moreover, based on averaging theory, a small amplitude periodic solution that bifurcates from a zero-Hopf equilibrium was derived in the Kingni\u2013Jafari system. 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