@article{KYB_1972_8_2_a4,
     author = {Havel, Ivan M.},
     title = {The concept of indirectness in artificial intelligence},
     journal = {Kybernetika},
     pages = {154--164},
     year = {1972},
     volume = {8},
     number = {2},
     zbl = {0239.68017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1972_8_2_a4/}
}