| On BCK Algebras - Part I.b: An Attempt to Treat Unitarily the Algebras of Logic. New Algebras Recent countries visiting this post |  |
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| On BCK Algebras - Part I.b: An Attempt to Treat Unitarily the Algebras of Logic. New Algebras Recent countries visiting this post | |
| 9 | United States |
| 1 | Turkey |
| 1 | China |
| 1 |