• http://www.gandul.info/magazin/foto-ultima-fotografie-a-lui-hachiko-cel-mai-loial-caine-din-lume-12166804

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• http://www.descopera.ro/natura/2329830-10-catei-care-au-schimbat-istoria 

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• Cartea ,,Totul despre cainele tau", de Kristin Mehus-Roe

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• ​http://www.vanzaricaini.com/cainii-in-cultura,-filme,-literatura,-etc.html

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• http://petbazar.ro/blog/caini-care-au-schimbat-istoria/