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https://research.ibm.com/publications/on-factoring-positive-operators On factoring positive operators for J. Math. Anal. Appl. - IBM Research On factoring positive operators for J. Math. Anal. Appl. by J Rissanen j mathanal applibm researchfactoringpositive https://permut.blogs.uv.es/2017/04/26/paper-on-s-semipermutable-subgroups-and-soluble-pst-groups-published-in-mediterr-j-math/ Paper “On S-Semipermutable Subgroups and Soluble PST-Groups” published in Mediterr. J. Math. | Blog... published inj mathpapersemipermutablesubgroups https://www.scik.org/index.php/jmcs/article/view/4471 Strongly spZc-connected spaces in topology | Sundari | J. Math. Comput. Sci. Strongly spZc-connected spaces in topology math comput sciconnected spacesstronglytopologysundari https://bmi.math.u-bordeaux.fr/cgi-bin/periodiques?bull=83,00 J.MATH.PURES APPL.(9) j mathpuresappl