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3. Berman, D. L., “A study of interpolation processes constructed on extended systems of nodes”, Izv. Vyssh. Vceb. Zav., Matematika, 105, 1971, pp. 22–31.
4. Bojanic, R., “A note on the precision of interpolation by Hermite-Fejér polynomials”, Proceedings of the 1969 conference on constructive theory of functions, Akademiai Kiadó, Budapest, 1972, pp. 69–76.
5. Bojanic, R., Prasad, J., and Saxena, R. B., “An upper bound for the rate of convergence of Hermite-Fejér process on the extended Chebyshev nodes of second kind”, J. Approx. Theory 26(3), 1979, pp. 195–203.