ShchedrykV. P. “The Left Greatest Common Divisor and the Left Least Common Multiple of All Solutions of the Matrix Equation BX = A over a Commutative Elementary Divisor Domain”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 73, no. 2, Feb. 2021, pp. 261 -67, doi:10.37863/umzh.v73i2.6321.