Lu, Z. J., & Lu, Z. J. (1990). On a three-surface theorem for elliptic differential inequalities with nonpositive zero-order coefficients. Miramare Trieste: International Centre for Theoretical Physics.
Chicago Style CitationLu, Zhu Jia, and Zhu Jia Lu. On a Three-surface Theorem for Elliptic Differential Inequalities With Nonpositive Zero-order Coefficients. Miramare Trieste: International Centre for Theoretical Physics, 1990.
MLA CitationLu, Zhu Jia, and Zhu Jia Lu. On a Three-surface Theorem for Elliptic Differential Inequalities With Nonpositive Zero-order Coefficients. Miramare Trieste: International Centre for Theoretical Physics, 1990.
Warning: These citations may not always be 100% accurate.