@article{10_14708_dm_v41i0_7024,
     author = {Miros{\l}awa Sajka and Paulina Fra\'s},
     title = {Enrichment of elementary school symmetry-learning process by using melody transformations},
     journal = {Didactica Mathematicae},
     pages = { 37--62},
     publisher = {mathdoc},
     volume = {41},
     year = {2019},
     doi = {10.14708/dm.v41i0.7024},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/dm.v41i0.7024/}
}