Computer Hope (17 oktober 2017). ”Parity bit” (på engelska). Arkiverad från originalet den 8 mars 2021. https://web.archive.org/web/20210308051819/https://www.computerhope.com/jargon/p/paritybi.htm. Läst 3 april 2021. ”[...] it asks the original computer to send the data again. [...] The inherent weakness in this type of error checking is that it can only detect an odd number of errors in the sequence. If an even number of bits are flipped, a parity check will not catch it.”
Computer Hope (17 oktober 2017). ”Parity bit” (på engelska). Arkiverad från originalet den 8 mars 2021. https://web.archive.org/web/20210308051819/https://www.computerhope.com/jargon/p/paritybi.htm. Läst 3 april 2021. ”[...] it asks the original computer to send the data again. [...] The inherent weakness in this type of error checking is that it can only detect an odd number of errors in the sequence. If an even number of bits are flipped, a parity check will not catch it.”