Koberer, Wolfgang (May 2016). «Notes: On the First Use of the Term "Chronometer"=». The Mariner's Mirror (United Kingdom: Society for Nautical Research) 102 (2): 203-205. S2CID164165009. doi:10.1080/00253359.2016.1167400.
Koberer, Wolfgang (May 2016). «Notes: On the First Use of the Term "Chronometer"=». The Mariner's Mirror (United Kingdom: Society for Nautical Research) 102 (2): 203-205. S2CID164165009. doi:10.1080/00253359.2016.1167400.