On the System of word equations x^i_1 x^i_2 ... x^i_m = y^i_1 y^i_2 ...y^i

Ismo Hakala Juha Kortelainen On the System of word equations x^i_1 x^i_2 ... x^i_m = y^i_1 y^i_2 ...y^i_n (i=1, 2, ...) in a Free Monoid. 217-230 1997 34 Acta Inf. 3 db/journals/acta/acta34.html#HakalaK97