Geodesic
Old and new necessary and sufficient conditions on $(a_i, m_i)$ in order that $n\equiv a_i (\operatorname {mod} m_i)$ be a covering system
Mathematica slovaca, Tome 53 (2003) no. 4, pp. 341-349
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Classification : 11B25 
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     author = {Porubsk\'y, \v{S}tefan and Sch\"onheim, Jochanan},
     title = {Old and new necessary and sufficient conditions on $(a_i, m_i)$ in order that $n\equiv a_i (\operatorname {mod} m_i)$ be a covering system},
     journal = {Mathematica slovaca},
     pages = {341--349},
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Porubský, Štefan; Schönheim, Jochanan. Old and new necessary and sufficient conditions on $(a_i, m_i)$ in order that $n\equiv a_i (\operatorname {mod} m_i)$ be a covering system. Mathematica slovaca, Tome 53 (2003) no. 4, pp. 341-349. http://geodesic.mathdoc.fr/item/MASLO_2003_53_4_a2/

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