Takhtadzhan, L A; Faddeev, Lyudvig D (31 October 1979). "The Quantum Method of the Inverse Problem and the Heisenberg Xyz Model". Russian Mathematical Surveys. 34 (5): 11–68. Bibcode:1979RuMaS..34...11T. doi:10.1070/RM1979v034n05ABEH003909.
Takhtadzhan, L A; Faddeev, Lyudvig D (31 October 1979). "The Quantum Method of the Inverse Problem and the Heisenberg Xyz Model". Russian Mathematical Surveys. 34 (5): 11–68. Bibcode:1979RuMaS..34...11T. doi:10.1070/RM1979v034n05ABEH003909.