Froda-Schechter, M. Relations induites par une relation de préordre. (French) Zbl 0206.29602 Stud. Univ. Babeş-Bolyai, Ser. Math.-Phys. 13, No. 2, 3-20 (1968). MSC: 06A99 PDFBibTeX XMLCite \textit{M. Froda-Schechter}, Stud. Univ. Babeș-Bolyai, Ser. Math.-Phys. 13, No. 2, 3--20 (1968; Zbl 0206.29602)
Froda-Schechter, M. Étude d’une propriété des translations d’ensembles. (Romanian) Zbl 0119.05301 Stud. Univ. Babes-Bolyai, Ser. I 5, No. 1, 57-69 (1960). PDFBibTeX XMLCite \textit{M. Froda-Schechter}, Stud. Univ. Babeș-Bolyai, Ser. Math.-Phys. 5, No. 1, 57--69 (1960; Zbl 0119.05301)