List of ZX80 and ZX81 clones (English Wikipedia)

Ahl, David (March 1981). "An Interview with Alfred Milgram". Sync Magazine. 1 (2): 6–7.
Inojosa, Ricardo (February 1984). "Os Pequenos Notáveis". Micro Sistemas. pp. 32–40.

ia600604.us.archive.org

"Ringo R470 advert".

ia800604.us.archive.org

Editele. "Z8000 Manual de Instruções" (PDF) (in Portuguese). Retrieved 2021-09-23.

backblazeb2.com

datassette.s3.us-west-004.backblazeb2.com

"Apply 300: o mais profissional dos micros pessoais" (PDF). Micro Sistemas (22): 85. July 1983.

computinghistory.org.uk

"Czerweny CZ 1500 - Computer - Computing History". www.computinghistory.org.uk. Retrieved 2023-01-16.

core.ac.uk

Marilza de Lourdes Cardi (2002-01-01). "Evolução da Computação no Brasil e sua Relação Com Fatos Internacionais" (PDF) (in Portuguese). Retrieved 2021-09-23.

datassette.org

"O Ringo R-470". Datassette (in Brazilian Portuguese). 2018-11-12. Retrieved 2023-01-05.

digitaloceanspaces.com

datassette.nyc3.cdn.digitaloceanspaces.com

Editele. "Manual CP200S" (PDF) (in Portuguese). Archived from the original (PDF) on 2021-09-23. Retrieved 2021-09-23.

epocalc.net

"epocalc - Computer models database". www.epocalc.net. Retrieved 2023-01-16.
"epocalc - Computer models database". www.epocalc.net. Retrieved 2023-01-16.

github.com

hackaday.io

"ZX80/81 Homebrew Clone".

hardcoregaming101.net

"Hardcore Gaming 101: History of Korean Gaming". www.hardcoregaming101.net. Retrieved 2023-01-16.

homecomputer.de

"HCM: The Home Computer Museum ..." www.homecomputer.de. Retrieved 2022-12-20.

interface1.net

"Sinclair Nostalgia Products - Sinclair Clones - Nova Electônica". www.interface1.net. Retrieved 2023-01-16.
"Sinclair Nostalgia Products - Sinclair Clones". www.interface1.net. Retrieved 2023-01-18.
"Sinclair Nostalgia Products - Sinclair Clones - Power 3000". www.interface1.net. Retrieved 2023-01-16.
"Sinclair Nostalgia Products - Sinclair Clones - MicroDigital". www.interface1.net. Retrieved 2023-01-16.

joins.com

koreajoongangdaily.joins.com

"Evolution of computers is told in Seoul museum". koreajoongangdaily.joins.com. 2016-10-21. Retrieved 2023-01-16.

k1.spdns.de

"Czerweny Electronica CZ 1000". k1.spdns.de. Retrieved 2023-01-16.
"Czerweny Electronica CZ 1500". k1.spdns.de. Retrieved 2023-01-16.
"Czerweny Electronica CZ 1000plus". k1.spdns.de. Retrieved 2023-01-16.
"Czerweny Electronica CZ 1500plus". k1.spdns.de. Retrieved 2023-01-16.

knaapic.nl

"zx97-lite".

mci.org.br

"Microdigital" (in Portuguese). 2002-01-01. Retrieved 2013-07-01.

microhobby.com

"czmain". 2005-01-07. Archived from the original on 2005-01-07. Retrieved 2023-01-16.

mma.com.br

ftp.mma.com.br

"NE Z8000". Archived from the original on 2008-01-24. Retrieved 2021-09-25.
"Micro AS1000 - ZX81". Clube Old Bits. 2008-06-11. Archived from the original on 2008-06-11. Retrieved 2023-01-16.

cobit.mma.com.br

"Micro CP200S - ZX81". Archived from the original on 2005-03-10. Retrieved 2005-08-05.

museo8bits.com

"AS-1000 advert". Micro Sistemas. January 1984. Archived from the original on 2018-10-01.

ntnu.no

rk.nvg.ntnu.no

"Planet Sinclair: Computers: Clones and variants: South American clones". rk.nvg.ntnu.no. Retrieved 2022-12-20.

old-computers.com

"MicroAce Microace". www.old-computers.com. Retrieved 2022-12-19.
"PC 8300 Lambda Electronics Ltd". www.old-computers.com. Retrieved 2023-01-16.
"TK-82 Microdigital". www.old-computers.com. Retrieved 2022-12-19.
"TK-83 Microdigital". www.old-computers.com. Retrieved 2022-12-19.
"TK-85 Microdigital". www.old-computers.com. Retrieved 2022-12-19.
"CP-200 Prologica". www.old-computers.com. Retrieved 2022-12-19.
"CZ-1000 Czerweny". www.old-computers.com. Retrieved 2023-01-16.
"CZ-1000 Plus Czerweny". www.old-computers.com. Retrieved 2023-01-16.

oldcomputermuseum.com

"MicroAce". oldcomputermuseum.com. Retrieved 2022-12-19.

retropolis.com.br

Cardoso, Cesar. "FC-30 | Retrópolis" (in Brazilian Portuguese). Retrieved 2023-01-16.

spectrumcomputing.co.uk

"Ringo R470".
"NE-Z8000". Spectrum Computing.

thomaspowell.com

"Trying Out the Ringo R-470, a Brazilian ZX-81 Clone - Code, Strings, and Keys". 2021-09-22. Retrieved 2023-01-05.

tistory.com

cfs4.tistory.com

"Goldstar FC-30 photo".

tk90x.com.br

"Clube do TK90X". www.tk90x.com.br. Retrieved 2022-12-19.

tynemouthsoftware.co.uk

blog.tynemouthsoftware.co.uk

"Minstrel blog".

velasco.com.br

"Engebrás AS-1000". MV - Marcos Velasco Software. Retrieved 2023-03-07.

web.archive.org

Editele. "Manual CP200S" (PDF) (in Portuguese). Archived from the original (PDF) on 2021-09-23. Retrieved 2021-09-23.
"Micro CP200S - ZX81". Archived from the original on 2005-03-10. Retrieved 2005-08-05.
"NE Z8000". Archived from the original on 2008-01-24. Retrieved 2021-09-25.
"Micro AS1000 - ZX81". Clube Old Bits. 2008-06-11. Archived from the original on 2008-06-11. Retrieved 2023-01-16.
"AS-1000 advert". Micro Sistemas. January 1984. Archived from the original on 2018-10-01.
"czmain". 2005-01-07. Archived from the original on 2005-01-07. Retrieved 2023-01-16.
"HERE IT IS !! We present Him to you, His name is TL801". TELLAB. 2002. Archived from the original on 2006-05-07.

zx80.it

"HERE IT IS !! We present Him to you, His name is TL801". TELLAB. 2002. Archived from the original on 2006-05-07.