<https://blogs.sw.siemens.com/polarion/the-greatest-danger-in-time-of-turbulences-is-not-the-turbulence-it-is-to-act-with-yesterdays-logic-peter-f-drucker/#webpage>
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<https://blogs.sw.siemens.com/polarion/the-greatest-danger-in-time-of-turbulences-is-not-the-turbulence-it-is-to-act-with-yesterdays-logic-peter-f-drucker/>