@misc{Popa_Valeriu_A,
 author={Popa, Valeriu},
 howpublished={online},
 publisher={Wydawnictwo Uniwersytetu Śląskiego},
 language={eng},
 type={artykuł},
 title={A general fixed point theorem for two pairs of absorbing mappings in Gp-metric spaces},
 keywords={matematyka},
}