DOI: 10.1055/s-00000028

International Journal of Sports Medicine

References

Kazimierczak M, Dąbrowska A, Adamczewska K. et al.
The impact of modern ultramarathons on shaping the social identity of runners. The case study of karkonosze winter ultramarathon.

Int J Environ Res Public Health 2020;
17: 116

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