@article{10_4064_am_20_1_137_140,
     author = {Krystyna Zi\k{e}tak},
     title = {Evaluation of coefficients of a double {Chebyshev} series of the function g(p(x+y))},
     journal = {Applicationes Mathematicae},
     pages = {137--140},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {1988},
     doi = {10.4064/am-20-1-137-140},
     zbl = {0708.65002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-20-1-137-140/}
}