1.      A. M. Barb, A. S. Gruia, and C. N. Avram, "Optical Energy Levels Scheme for Co²⁺ doped in K(Mg,Zn)F₃ Fluoroperovskites," Physica B 482, 24–27 (2016).

2.      C. N. Avram, A. S. Gruia, M. G. Brik, and A. M. Barb, "Calculations of the electronic levels, spin-Hamiltonian parameters and vibrational spectra for the CrCl₃ layered crystals," Physica B 478, 31–35 (2015).

3.      S. Ivascu, A. S. Gruia, and N. M. Avram, "Crystal field effects on interionic distance in cubic MgO crystal doped with Fe²⁺ ions," Physica B 450, 146–150 (2014).

4.      M. G. Brik, A. S. Gruia, C. N. Avram, E.-L. Andreici, and N. M. Avram, "First principles and crystal field calculations of the spectral, structural and electric properties of (Na, Li)VSi₂O₆ clinopyroxenes crystals," Phys. Scr. T162, 014021 (2014).

5.      M. G. Brik, N. M. Avram, and A. S. Gruia, "Calculation of the spectral, structural, and electronic properties of NaCrSi₂O₆ and LiCrSi₂O₆ crystals," Opt. Mater. 35, 1772–1775 (2013).

6.      M. Birdeanu, A.-V. Birdeanu, A. S. Gruia, E. Fagadar-Cosma, and C. N. Avram, "Synthesis and characterization of Zn₃Ta₂O₈ nanomaterials by hydrothermal method," J. Alloy. Compd. 573, 53–57 (2013).

7.      A. M. Barb, A. S. Gruia, and C. N. Avram, "Modeling of crystal field and spin-Hamiltonian parameters for Ti³⁺:MgO," Physica B 430, 64–66 (2013).

8.      R. Nistora and A. S. Gruia, "Simulating energy level schemes using SAAS for MGa₂O₄ (M = Mg, Zn) and MgF₂ doped with Co²⁺ and Cr³⁺", Optoelectron. Adv. Mater.-Rapid Commun. 6, 717–720 (2012).

9.      A. S. Gruia, C. N. Avram, N. M. Avram, and M. G. Brik, "Ab initio calculations of the structural, electronic and elastic properties of K₃CrF₆," Phys. Scr. T149, 014065 (2012).

10.    E. L. Andreici, A. S. Gruia, and N. M. Avram, "The parameters of the free ions Mn⁵⁺ and Fe⁶⁺", Phys. Scr. T149, 014060 (2012).

11.    N. M. Avram, M. G. Brik, C. N. Avram, and A. S. Gruia, "Crystal Field and First Principle Calculation of Optical and Electronic Properties of ZnCr₂O₄ Spinel," in Physics Conference (tim-10), M. Bunoiu and I. Malaescu, eds. (Amer Inst Physics, 2011), Vol. 1387.

12.    C. N. Avram, M. G. Brik, and A. S. Gruia, "Theoretical calculations of energy levels scheme of Cr³⁺ - doped LiAl₅O₈ spinel," Optoelectron. Adv. Mater.-Rapid Commun. 4, 1127–1130 (2010).

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