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Kosan M. T., Zemlicka J.
INTERNATIONAL ELECTRONIC JOURNAL OF ALGEBRA, vol.26, pp.131-144, 2019 (ESCI)
In this paper, we give a general method of the construction of a 3-dimensional associative algebra R over an arbitrary field F that is a sum of two subalgebras R-1 and R-2 (i.e. R = R-1 + R-2).