Journal of the Physical Society of Japan 60 (1991) pp. 441-449 Lee-Yang Complex-Field Systems and Frustrated Ising Models Masuo Suzuki Progress of Theoretical Physics Vol. 23 No. 2 (1960) pp. 374-376 Spontaneous Magnetization, A Generalized Square Lattice Itiro Syozi and Shigeo Naya Progress of Theoretical Physics Vol. 24 No. 4 (1960) pp. 829-839 Symmetrical Properties of Two-Dimensional Ising Lattices Itiro Syozi and Shigeo Naya
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T. Utiyama (1951) studied this question.