[1] Gilmer R.: Multiplicative ideal theory I, II. Queen's Papers on Pure and Applied Math. No. 12, Ontario 1968. MR 0229624

[2] Korec I.: On a generalization of Mycielski's and Znám's conjectures about coset decomposition of Abelian groups. Fund. Math. 85, 41 - 48 (1974). DOI 10.4064/fm-85-1-41-48 | MR 0357557 | Zbl 0286.20053

[3] Mycielski J., Sierpinski W.: Sur une propriété des ensembles linéaires. Fund. Math. 58, 143-147 (1966). DOI 10.4064/fm-58-2-143-147 | MR 0204296 | Zbl 0145.05803

[4] Porubský Š.: Covering systems and generating functions. Acta Arith. 26, 223 - 231 (1975). DOI 10.4064/aa-26-3-223-231 | MR 0379423

[5] Porubský Š., Znám Š.: On covering of rings by their residue classes. Acta Fac. Rerum Natur. Univ. Comenian. Math. 27, 45 - 51 (1972). MR 0409429

[6] Znám Š.: On Mycielski's problem on system of arithmetical progressions. Colloq. Math. 25, 201-204 (1966). DOI 10.4064/cm-15-2-201-204 | MR 0200235

[7] Znám Š.: On properties of systems of arithmetic sequences. Acta Arith. 26, 279-283 (1975). DOI 10.4064/aa-26-3-279-283 | MR 0379424