https://www.ukcdogs.com/docs/breeds/spanish-mastiff.pdf,
https://www.fci.be/Nomenclature/Standards/091g02-en.pdf,
https://amiradog.com/wp-content/uploads/2024/12/MASTIN-ESPANOL.pdf,
https://wilderness-society.org/wp-content/uploads/2018/10/Verbreitung_GuardDogs_Karte_Print.pdf,
http://hrfiisland.weebly.com/uploads/2/2/3/3/22333014/rafael_malo_alcrudo.pdf,
https://www.dogsnsw.org.au/media/6011/2024-25-obe-major-breeds.pdf,
https://helvia.uco.es/bitstream/handle/10396/33875/animals-15-02908-v2.pdf?sequence=1&isAllowed=y,
https://makhillpublications.co/files/published-files/mak-java/2009/7-1412-1418.pdf,
https://scispace.com/pdf/usefulness-of-discriminant-analysis-in-themorphofunctional-4r7vzt904h.pdf,
https://www.ukcdogs.com/docs/breeds/majorca-mastiff.pdf,
http://images.akc.org/pdf/judges/Low_Entry_Breeds_List.pdf,
https://cdpnews.net/wp-content/uploads/2023/11/cdpnews_lagos-et-blanco_2021.pdf,
https://ftp.raceforum.com/virtual-library/wFGWm5/5FE093/presa-canario_breed__history.pdf,
https://pestsmart.org.au/wp-content/uploads/sites/3/2020/06/Guardian-Dogs-web.pdf,
https://s3.wp.wsu.edu/uploads/sites/2073/2020/05/Livestock-Guardian-Dogs-2020-powerpoint-3.pdf,
https://dogsaustralia.org.au/media/10349/5-da-reg5_conformation-show_01-01-24-ramp-listingv5.pdf,
https://pestsmart.org.au/wp-content/uploads/sites/3/2020/06/Guardian-Dogs-web.pdf,
https://akc.fcm.mx/descargas/AKC-NOT-RECOGNIZED-BREEDS.pdf,
https://s3.wp.wsu.edu/uploads/sites/2073/2020/05/Livestock-Guardian-Dogs-2020-powerpoint-3.pdf,
https://www.tiq.com.sg/wp-content/uploads/2024/08/Pet-Breed-List.pdf,
https://digitalcommons.unomaha.edu/cgi/viewcontent.cgi?article=1113&context=psychfacpub,
https://cdn.prod.website-files.com/6723b145326a4e144cec71d8/67b8fdb33717b1b69b683e82_8228197101.pdf,
https://bmcbiol.biomedcentral.com/counter/pdf/10.1186/s12915-025-02344-2.pdf,
https://warangers.asn.au/wp-content/uploads/2020/10/Restricted-breeds-dangerous-dogs.pdf,
https://cdpnews.net/wp-content/uploads/2023/11/cdpnews_lagos-et-blanco_2021.pdf,
https://doa.gov.ky/wp-content/uploads/2023/07/Prohibited-Dog-Breeds-List-Rev-March-2014.pdf,
https://pdfs.semanticscholar.org/fd05/6d8e4341e3f357e177202733dc911acf897b.pdf,
https://vgl.ucdavis.edu/sites/g/files/dgvnsk15116/files/media/documents/EnglishMastiff20190918_0.pdf,
https://www.villageofrivermoor.com/wp-content/uploads/PetRegs.pdf,
https://www.riverrockrva.com/wp-content/uploads/2018/03/dog-breed-abbreviations.pdf,
https://www.vet-library.com/wp-content/uploads/2024/06/products-TOC-Breed-predispositions-to-disease-in-dogs-and-cats-3.pdf,
https://www.symppis.com/wp-content/uploads/2024/08/Dog-breeds.pdf,