L. Ristić, V. Lazić, S. Postić, N. Jelić, I. Djordjević, and R. Mladenović, “The connection between discolored gingiva of abutment teeth and the presence of cast post”, Vojnosanit Pregl, vol. 80, no. 09, Sep. 2023, doi: 10.2298/VSP221203012R.