@article{RM_2005_60_2_a0,
     author = {L. D. Beklemishev},
     title = {Reflection principles and provability algebras in~formal arithmetic},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {197--268},
     publisher = {mathdoc},
     volume = {60},
     number = {2},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2005_60_2_a0/}
}