@article{SM_1968_6_4_a0,
     author = {Yu. I. Manin},
     title = {Correspondences, motifs and monoidal transformations},
     journal = {Sbornik. Mathematics},
     pages = {439--470},
     publisher = {mathdoc},
     volume = {6},
     number = {4},
     year = {1968},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1968_6_4_a0/}
}