@article{MAN_1965__158_161261,
     author = {J. Schmidt},
     title = {Die \"uberinvarianten und verwandte {Kongruenzrelationen} einer allgemeinen {Algebra.}},
     journal = {Mathematische Annalen},
     pages = {131--157},
     publisher = {mathdoc},
     volume = {158},
     year = {1965},
     zbl = {0128.02401},
     url = {http://geodesic.mathdoc.fr/item/MAN_1965__158_161261/}
}