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Kishore Nawal; Adhikary D. N.: Dependence of associativity conditions for ternary operations. In: Acta scientiarum mathematicarum, (40) 3-4. pp. 285-290. (1978)
Kishore Nawal; Adhikary D. N.: Independece of the conditions of associativity in ternary operations. In: Acta scientiarum mathematicarum, (33) 3-4. pp. 275-284. (1972)