no. 1-2
Fundamental notions in the theory of seminearrings
Compositio Mathematica, Tome 18 (1967) no. 1-2, pp. 65-78 
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     title = {Fundamental notions in the theory of seminearrings},
     journal = {Compositio Mathematica},
     pages = {65--78},
     year = {1967},
     publisher = {P. Noordhoff N. V., Groningen},
     volume = {18},
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     zbl = {0166.03904},
     language = {en},
     url = {https://www.numdam.org/item/CM_1967__18_1-2_65_0/}
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Van Hoorn, Willy G.; Van Rootselaar, B. Fundamental notions in the theory of seminearrings. Compositio Mathematica, Tome 18 (1967) no. 1-2, pp. 65-78. https://www.numdam.org/item/CM_1967__18_1-2_65_0/

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