Potentially eventually positive double star sign patterns. - Ber-Lin Yu; Ting-Zhu Huang; Jun Luo; Hong-Bo Hua (Appl. Math. Lett., 2012)

On the Eventual Exponential Positivity of Some Tree Sign Patterns. - Ber-Lin Yu; Zhongshan Li; Sanzhang Xu (Symmetry, 2021)

Eventual Positivity of a Class of Double Star-like Sign Patterns. - Ber-Lin Yu; Zhongshan Li; Gu-Fang Mou; Sanzhang Xu (Symmetry, 2022)