1. Polynomial interpolation to boundary data on triangles;Barnhill;Math. Comp.,1975
2. On the degree of approximation of non-periodic continuous functions by linear operators;Cao;Fudan Xuebao,1979
3. Generalizations of Timan's theorem, Lehnhoff's theorem and Telyakowskiĭ's theorem;Cao;Kexue Tongbao,1986
4. Generalizations of Timan's Theorem, Lehnhoff's Theorem and Telyakowskiĭ's Theorem;Cao,1986
5. Approximation by Boolean sums of positive linear operators;Cao;Rend. Mat.,1986