@article{Guterch_Aleksander_Professor_2020,
 author={Guterch, Aleksander and Janik, Tomasz},
 volume={vol. 41},
 number={No 4},
 howpublished={online},
 journal={Polish Polar Research},
 pages={315-316},
 year={2020},
 publisher={Polish Academy of Sciences},
 publisher={Committee on Polar Research},
 title={Professor Marek Grad (1951–2020) an outstanding Polish geophysicist and polar researcher},
 type={Nécrologie / Obituary},
 doi={10.24425/ppr.2020.135372},
}