On a six-point configuration attached to a tetrahedron cut by three planes parallel to a face

D.V. Ionescu
Institutul de Calcul

?

D.V. Ionescu, On a six-point configuration attached to a tetrahedron cut by three planes parallel to a face, (French) Mathematica, Timişoara 18, (1942). 104–111.

https://ictp.acad.ro/wp-content/uploads/2025/12/1942-Mathematica-Sur-une-configuration-de-six-points-attachee-a-un-tetraedre.pdf

google scholar link