1. W. M. Schmidt and Y. Wang, “A Note on a Transference Theorem of Linear Forms,” Sci. Sin. 22(3), 276–280 (1979).
2. Y. Wang and K. Yu, “A Note on Some Metrical Theorems in Diophantine Approximation,” Chin. Ann. Math. 2, 1–12 (1981).
3. J. W. S. Cassels, An Introduction to Diophantine Approximation (Cambridge Univ. Press, Cambridge, 1957).
4. J. W. S. Cassels and H. P. F. Swinnerton-Dyer, “On the Product of Three Homogeneous Linear Forms and Indefinite Ternary Quadratic Forms,” Philos. Trans. R. Soc. London A 248, 73–96 (1955).
5. F. J. Dyson, “On Simultaneous Diophantine Approximations,” Proc. London Math. Soc., Ser. 2, 49, 409–420 (1947).