A. Kh. Zilbershtein, et al. “Discovery of Natural Separation of Isotopes in Layered Intrusions Provided by the Gradients of a Temperature, of a Pressure and of a Deformation, Using Lukkulaisvaara Intrusion (North Karelia) As an Example”. Innovations in Science and Technology Vol. 7, Mar. 2022, pp. 7-16, doi:10.9734/bpi/ist/v7/1939B.