PORTELLA, P.D.; HELMERICH, R. Adolf Martens and his contribution to materials engineering. Engineering Failure Analysis. 2014-08, roč. 43, s. 2–10. Dostupné online [cit. 2024-03-09]. doi:10.1016/j.engfailanal.2014.03.001. (anglicky)
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PORTELLA, P.D.; HELMERICH, R. Adolf Martens and his contribution to materials engineering. Engineering Failure Analysis. 2014-08, roč. 43, s. 2–10. Dostupné online [cit. 2024-03-09]. doi:10.1016/j.engfailanal.2014.03.001. (anglicky)