LUNG, C.; MARCONI, D.; POP, A. STUDY OF STRUCTURAL, MORPHOLOGICAL AND ELECTRICAL PROPERTIES IN THE (Bi₁.₆Pb₀.₄)(Sr₁.₈Ba₀.₂)Ca₂(Cu₁₋ₓ Gdₓ)₃Oᵧ SUPERCONDUCTORS. Studia UBB Physica 2018, 63, 133-142.