@article{Zhang_2018, title={Value distribution of differential-difference polynomials of meromorphic functions}, volume={70}, url={http://umj.imath.kiev.ua/index.php/umj/article/view/1569}, abstractNote={We obtain the results on the deficiencies of differential-difference polynomials. These results can be regarded as differential difference
analogs of some classical theorems on differential polynomials. In particular, an exact estimate of the deficiency of some differential-difference polynomials is presented. We also give examples showing that these results are best possible in a certain sense.}, number={4}, journal={Ukrainsâ€™kyi Matematychnyi Zhurnal}, author={ZhangR. R.}, year={2018}, month={Apr.}, pages={471-480} }