@ARTICLE{Stankiewicz_Anna_On_2013, author={Stankiewicz, Anna}, number={No 1}, journal={Teka Commission of Motorization and Power Industry in Agriculture}, howpublished={online}, year={2013}, publisher={The Lublin Branch of the Polish Academy of Sciences}, title={On determining the nonnegative relaxation spectrum of viscoelastic materialsusing complementary error functions}, }