-- This is a subproject of [[https://www3.svjatoslav.eu/projects/sixth-3d/][Sixth 3D]] which in turn is a subproject of
- [[https://www3.svjatoslav.eu/projects/sixth/][Sixth]].
+- This is a subproject of [[https://www3.svjatoslav.eu/projects/sixth-3d/][Sixth 3D]]:
+ - which in turn is a subproject of parent project [[https://www3.svjatoslav.eu/projects/sixth/][Sixth]].