@misc {MATHEDUC.02445492,
    author       = {Graeber, S. and Roehr, A.},
    title        = {Mathematics contest for school students. Mathematischer Schuelerwettbewerb.},
    howpublished = {IMU - Inf. Mathematikunterr. (Oct 1980) v. 5(2) p. 56-61.},
    year         = {1980},
    msc2010      = {U40xx},
    identifier   = {1981x.00197},
}