Luhn algorithm (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Luhn algorithm" in English language version.

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US patent 2950048A, Luhn, Hans Peter, "Computer for Verifying Numbers", published 23 August 1960, issued 23 August 1960

Raj, Deepak; Figiel, Troy (14 November 2022). "Verhoeff's algorithm implementation for checksum digit calculation". GitHub. Archived from the original on 25 July 2024. Retrieved 25 July 2024.

Albanese, Ilenia (10 August 2022). "A cosa serve la Partita Iva? Ecco cosa sapere" [What is a VAT number for? Here's what to know]. Partitaiva.it (in Italian). Archived from the original on 29 June 2024. Retrieved 29 June 2024.

Raj, Deepak; Figiel, Troy (14 November 2022). "Verhoeff's algorithm implementation for checksum digit calculation". GitHub. Archived from the original on 25 July 2024. Retrieved 25 July 2024.
Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems (PDF) (28th ed.). United States: United States Postal Service. 10 October 2023. Archived (PDF) from the original on 17 November 2023. Retrieved 29 November 2023.
Albanese, Ilenia (10 August 2022). "A cosa serve la Partita Iva? Ecco cosa sapere" [What is a VAT number for? Here's what to know]. Partitaiva.it (in Italian). Archived from the original on 29 June 2024. Retrieved 29 June 2024.