SpringerLink (Online service), Furbach, U., & Nerode, A. (1997). Logic Programming and Nonmonotonic Reasoning: Fourth International Conference, LPNMR'97, Dagstuhl Castle, Germany, July 28-31, 1997, Proceedings (1st ed. 1997.). Springer Berlin Heidelberg : Imprint: Springer. https://doi.org/10.1007/3-540-63255-7
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Ulrich Furbach, και Anil Nerode. Logic Programming and Nonmonotonic Reasoning: Fourth International Conference, LPNMR'97, Dagstuhl Castle, Germany, July 28-31, 1997, Proceedings. 1st ed. 1997. Berlin, Heidelberg: Springer Berlin Heidelberg : Imprint: Springer, 1997. https://doi.org/10.1007/3-540-63255-7.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Logic Programming and Nonmonotonic Reasoning: Fourth International Conference, LPNMR'97, Dagstuhl Castle, Germany, July 28-31, 1997, Proceedings. 1st ed. 1997. Springer Berlin Heidelberg : Imprint: Springer, 1997. https://doi.org/10.1007/3-540-63255-7.
