PETZELT, Jan, OSTAPCHUK, Tetyana, KAMBA, Stanislav. Ferroelectric soft-mode spectroscopy in disordered bulk and thin-film perovskites. In: BORSTEL, G., ed. Defects and Surface-Induced Effects in Advanced Perovskites. Kluwer: Kluwer Academic, 2000, s. 233-248.