Tetrahedral Element Shape Functions

I prepared a FEM code for tetrahedral element (C3D4) but I don't know how to check my code is right or not. Is there any toolbox to extract stiffnness and mass matrix of the structure with C3D10 element?

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KSSV
KSSV am 22 Aug. 2020
You pickup a simple problem, solve it and check with theory or exisitng solutions.

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am 22 Aug. 2020

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