@article{10_4064_fm_121_1_1_15,
     author = {Zygmunt Vetulani},
     title = {Ramified analysis and the minimal \ensuremath{\beta}-models of higher order arithmetics},
     journal = {Fundamenta Mathematicae},
     pages = {1--15},
     publisher = {mathdoc},
     volume = {121},
     number = {1},
     year = {1984},
     doi = {10.4064/fm-121-1-1-15},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-121-1-1-15/}
}