Lavidas, Nikolaos and Fotiadou, Georgia and Tsimpli, Ianthi Maria, Active vs. nonactive Voice in the Greek diachrony: Real or apparent optionality in the use of Voice Morphology?, 390-400, 2012, http://www.icgl.gr/files/English/31.Lavidas_et_al_10ICGL_pp.390-400.pdf,