Vertices order for normal computation

Hello!

I want to ask: which vertex order in triangle embree uses for normal computation?

As far as i can see embree uses clock-wise order. So triangle with vertices ((0, 0, 0), (1, 0, 0), (0, 1, 0)) has (0, 0, -1) normal. Also it matches with https://software.intel.com/en-us/forums/embree-photo-realistic-ray-traci.... But i cannot find any information about it inside documentation, so i want to justify my thoughts.

Thanks in advance!