@article{SM_1968_6_1_a4,
     author = {L. L. Tsinman},
     title = {On the role of the principle of induction in a formal arithmetic system},
     journal = {Sbornik. Mathematics},
     pages = {65--95},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {1968},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1968_6_1_a4/}
}