--- /dev/null
+@manual{ext_external_objects,
+ title = {EXT\_external\_objects (GL\_EXT\_memory\_object, GL\_EXT\_semaphore)},
+ note = {\url{https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_external_objects.txt}},
+ author = {Carsten, Rohde and Dave, Airlie and James, Jones
+ and Jan-Harald, Fredriksen and Jeff, Juliano and Michael, Worcester},
+ year = {July 18, 2018}
+}