The XMM-Newton and INTEGRAL operational ground segment: Synergetic systems and software operated for more than two decades. - Marcus G. F. Kirsch; Greta De Marco; Frank Dreger; Aniris Inojosa; Gianluca Gaudenzi; Jutta M. Huebner; Sebastian Kriege; Richard T. Southworth; Uwe Weissmann (Astron. Comput., 2026)