Venkova, Tzvetomira. 2006. Unexpressed object alternations of Bulgarian verbs in HPSG. Proceedings of the 13th International Conference on Head-Driven Phrase Structure Grammar 441–455. (doi:10.21248/hpsg.2006.24) (https://proceedings.hpsg.xyz/article/view/661) (Accessed May 3, 2024.)