1. Proper intersection multiplicity and regular separation of analytic sets;['Cygan, Ewa', 'Tworzewski, Piotr'];Ann. Pol. Math.,1994
2. Regular separation with parameter of complex analytic sets;['Denkowski, Maciej P.'];Kodai Math. J.,2007
3. Order of tangency between manifolds;['Domitrz, Wojciech', 'Mormul, Piotr', 'Pragacz, Piotr'];Schubert Calculus and its applications in combinatorics and representation theory,2020
4. [4] Jensen, Gary R. Higher order contact of submanifolds of homogeneous spaces, Lecture Notes in Mathematics, 610, Springer, 1977
5. [5] Łojasiewicz, Stanis Ensembles semi-analytiques, I.H.E.S, Bures-sur-Yvette, 1965 (https://perso.univ-rennes1.fr/michel.coste/Lojasiewicz.pdf)