Update dice.md

docs.it4i/dice.md

@@ -325,7 +325,7 @@ For more commands, use the `ihelp` command.
 
 ## PID Services
 
-You, as user, may want to index your datasets and allocate some PIDs - Persistent Identifiers for them. We host pid system by hdl-surfsara ( https://it4i-handle.it4i.cz ), wich is conected to https://hdl.handle.net , and you are able to create your own PID by calling some of irule.
+You, as user, may want to index your datasets and allocate some PIDs - Persistent Identifiers for them. We host pid system by hdl-surfsara ([https://it4i-handle.it4i.cz][o]), wich is conected to [https://hdl.handle.net][p], and you are able to create your own PID by calling some of irule.
 
 ### How to Create PID
 
@@ -419,3 +419,5 @@ units:
 [l]: https://www.eudat.eu/contact-support-request?Service=B2SAFE
 [m]: https://aai.it4i.cz/
 [n]: https://www.eudat.eu/catalogue/b2handle
+[o]: https://it4i-handle.it4i.cz
+[p]: https://hdl.handle.net