Update UnitSystem.md

wiki/doc/UnitSystem.md

@@ -136,9 +136,9 @@ Description how to build units witht the D-SI format is [here](StructureSIUnits.
 |D-SI Identifyer|D-SI Medal|SI name|SI symbol |SI base unit expression|D-SI base unit expression|SI Reference| 
 |-:|-:|-:|-:|-:|-:|-:| 
 |\clight|bronze|n. u. speed|*c<sub>0</sub>*|m/s|\metre\second\tothe{-1}|[3, Table 7]| 
-|\planckbar|bronze|n. u. action|h bar|Js|\joule\second|[3, Table 7]|
+|\planckbar|bronze|n. u. action|*ħ*|Js|\joule\second|[3, Table 7]|
 |\electronmass|bronze|n. u. mass|*m<sub>e</sub>*|kg|\kilogram|[3, Table 7]| \atomicmassunit
-|\naturalunittime|bronze|n. u. time|ħ/(mec02)|s|\second|[3, Table 7]| atomicunittime
+|\naturalunittime|bronze|n. u. time|*ħ/(m<sub>e</sub>c<sub>0</sub><sup>2</sup>)*|s|\second|[3, Table 7]| atomicunittime
 |astronomical unit charge|bronze|||||[3, Table 7]|
 |astro unit time|bronze |||||[3, Table 7]|
 |\planckbar|bronze |||||[3, Table 7]|