12–14 April 2011 Noordwijk, the Netherlands, European Space Agency / European Space Research and Technology Center, Noordwijk 2011, za: https://www.researchgate.net/publication/313393647_ADVANCED_PENETRATORS_AND_HAMMERING_SAMPLING_DEVICES_FOR_PLANETARY_BODY_EXPLORATION [dostęp 2021-04-15].

Jerzy Grygorczuk, Karol Seweryn, Roman Wawrzaszek, Marek Banaszkiewicz, Technological Features in the New Mole Penetrator "KRET", w: Huguette Lacoste (red.), Proceedings of the 13th European Space Mechanisms and Tribology Symposium. 23–25 September 2009 Vienna, Austria, European Space Agency, Noordwijk 2009, za: https://www.esmats.eu/esmatspapers/pastpapers/pdfs/2009/grygorczuk.pdf [dostęp 2021-04-15]. Jerzy Grygorczuk, Łukasz Wiśniewski i in., Hammering Mechanism for HP3 Experiment (InSight), w: Edward A. Boesiger (red.), 43rd Aerospace Mechanisms Symposium, National Aeronautics and Space Administration, Santa Clara, Kalifornia 2016, s. 415–428, za: https://esmats.eu/amspapers/pastpapers/pdfs/2016/grygorczuk2.pdf [dostęp 2021-04-15]. Jerzy Grygorczuk, Łukasz Wiśniewski i in., High Energy and Efficiency Penetrator HEEP, w: Leny Ouwehand (red.), Proceedings of ESMATS. 15th European Space Mechanisms and Tribology Symposium.