Matéria BBC

https://www.bbc.com/portuguese/videos_e_fotos/2015/03/150212_soldado_datavis_rp.amp

Matéria Wall Street Jounal

https://www.contabilidade-financeira.com/2006/12/custo-de-um-soldado.html

Preço Spot

https://mundoconectado.com.br/noticias/v/14140/robo-cachorro-spot-da-boston-dynamics-esta-a-venda-por-us-74-mil

Spot sendo usado para patrulhar base americana.

https://www.google.com/url?sa=t&source=web&rct=j&url=https://m.youtube.com/watch%3Fv%3DPvPhRyQji1w&ved=2ahUKEwjh37Hr1uruAhVHFLkGHSvIDAgQ28sGMAF6BAgBEBc&usg=AOvVaw1MIn9k2TecqhJ5ZWOO94t5