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Recently, invariant constant mean curvature (CMC) surfaces in real space forms have been characterized locally by using extremal curves of a Blaschke type energy functional  . Here, we use this characterization to offer a new approach to some global results for CMC rotational surfaces in the 3-sphere.doi:10.2298/fil1904191a fatcat:ithznsm6org4li2py5epm5kqwq