Development and applicability of advanced methods for solving 'difficult' crystal structures by X-ray analysis / Olaf Randolph IsraëlCorrelations between charge, orbital, and spin degrees of freedom in magnetic competing systems / Ismudiati Puri HandayaniCorrelations between charge, orbital, and spin degrees of freedom in magnetic competing systems / Ismudiati Puri HandayaniSome aspects of electron lattice interaction in polar crystals / by Hans Joachim Gustav Meyer