Question Regarding Cubic Interpolation in Timelines

Our team is doing research with a neuroscience lab @uwaterloo, and we were wondering if there was any additional documentation regarding how the engine calculates the Automatic Interpolation for Timeline curves.

Any help would be greatly appreciated, thanks

Specifically, if UE4.15.3 uses C++ 14 Standard, does that imply that the Cubic Spline is calculated according to what method.

Is this equivalent?