If you are looking for specific papers that extensively use or analyze TET4 elements, consider these examples:
Papers discussing TET4 elements generally address the following characteristics:
: These elements are known to "lock" (over-stiffen) when simulating nearly incompressible materials or bending deformations, leading to results that underestimate true solutions.
: Despite accuracy issues, TET4 is popular because it allows for easy and robust automatic meshing of complex 3D geometries. Relevant Academic Literature