|Link=https://www.academia.edu/11988145/The_scholarly_correspondence_of_Joseph_Eckhel_1737-1798_a_new_source_for_the_history_of_numismatics_in_Beitr%C3%A4ge_zum_6._%C3%96sterreichischen_Numismatikertag_Haller_M%C3%BCnz-Bl%C3%A4tter_8_2015_pp._45_56 | |Link=https://www.academia.edu/11988145/The_scholarly_correspondence_of_Joseph_Eckhel_1737-1798_a_new_source_for_the_history_of_numismatics_in_Beitr%C3%A4ge_zum_6._%C3%96sterreichischen_Numismatikertag_Haller_M%C3%BCnz-Bl%C3%A4tter_8_2015_pp._45_56 |