Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1998_63_4_a17, author = {V. G. Kanovei and J. Zapletal}, title = {Pyramidal structure of constructibility degrees}, journal = {Matemati\v{c}eskie zametki}, pages = {632--635}, publisher = {mathdoc}, volume = {63}, number = {4}, year = {1998}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1998_63_4_a17/} }
V. G. Kanovei; J. Zapletal. Pyramidal structure of constructibility degrees. Matematičeskie zametki, Tome 63 (1998) no. 4, pp. 632-635. http://geodesic.mathdoc.fr/item/MZM_1998_63_4_a17/