Francis C. MottaPatrick D. ShipmanBethany SpringerOptimally Topologically Transitive Orbits in Discrete Dynamical Systems.115-1352016123Am. Math. Mon.2https://www.tandfonline.com/doi/abs/10.4169/amer.math.monthly.123.2.115db/journals/tamm/tamm123.html#MottaSS16