https://vgl.ucdavis.edu/sites/g/files/dgvnsk15116/files/media/documents/EnglishMastiff20190918_0.pdf,
https://images.akc.org/pdf/breeds/standards/Mastiff.pdf,
https://www.ukcdogs.com/docs/breeds/mastiff.pdf,
https://www.fci.be/Nomenclature/Standards/092g02-en.pdf,
http://cdn.akc.org/NeopolitanMastiff-club-flyer.pdf,
https://dogwellnet.com/applications/core/interface/file/attachment.php?id=6185&key=30b28e2dfb40175171d6afc58d3a8c1a,
http://breedstandardlibrary.com/wp-content/uploads/2024/03/Cane-Corso-Neapolitan-Comparison_opt.pdf,
https://bullmastiff.us/wp-content/uploads/2017/01/aba-judges-ed-pp-final-version-2015.pdf,
https://www.sciencedirect.com/science/article/pii/S1751731111001042/pdf?md5=420dde2478919ec394f942bada554d60&pid=1-s2.0-S1751731111001042-main.pdf,
http://www.fci.be/nomenclature/Standards/197g02-en.pdf,
https://s3.amazonaws.com/external_clips/4712975/Most_Illegal_Dog_Breeds_in_the_World.pdf?1689868592,
http://www.noblelegacytibetanmastiffs.com/tms-lgds.pdf,
https://www.raudogshows.com/wp-content/uploads/Mastiff-CoA-2025-CAT-Body-BWreduced.pdf,
https://www.ecvo.eu/media/mastiffenglishfrenchgermanspanish.pdf,
https://www.ukcdogs.com/docs/breeds/tibetian-mastiff.pdf,
https://dogwellnet.com/applications/core/interface/file/attachment.php?id=6184&key=9003eb1af9cb726ab0ffa364d3a2bf9d,
https://doa.gov.ky/wp-content/uploads/2022/08/Prohibited-Dog-Brochure.pdf,
https://digitalcommons.unomaha.edu/cgi/viewcontent.cgi?article=1113&context=psychfacpub,
https://pdfs.semanticscholar.org/0a29/bb713184f6202c7053abdf662074645993a0.pdf,
https://www.columbiariverrv.com/documentation/restricted-dog-breeds.pdf,
https://lfst.dk/Media/638675108088444828/Pertoldi_et_al._J_Animal_Sci._2013.pdf,
https://www.housing.af.mil/portals/79/documents/AFD-110829-048.pdf,
https://www.mastiffhealth.org/Canine_Cardiomyopathy.pdf,
https://images.akc.org/pdf/breeds/standards/NeapolitanMastiff.pdf,
http://www.noblelegacytibetanmastiffs.com/tms-lgds.pdf,
https://www.dogsbite.org/reports/13-years-us-dog-bite-fatalities-2005-2017-dogsbite.pdf,
https://dab.hawaii.gov/ai/files/2013/01/aqs-66.pdf,
https://www.ukcdogs.com/docs/breeds/spanish-mastiff.pdf,
https://www.upcinsurance.com/docs/default-source/underwriting/forms/ct-animal-guidelines.pdf,
https://www.raudogshows.com/wp-content/uploads/Mastiff-Club-of-America-Saturday-Prelims.pdf,