Investigation of multiphase equilibria in the subsolidus of BaO–CoO–Fe2O3–Al2O3 systemOleg Kostyrkin, Galina Shabanova, Sergei Logvinkov, Natalia Tsapko and Maryna IvashchenkoMATEC Web Conf., 116 (2017) 01006DOI: https://doi.org/10.1051/matecconf/201711601006