Human Quadrupeds - Science
Becoming Human: The Evolution of Walking Upright
Mutations may make humans walk on all fours | Nature
Humans and other bipeds: the evolution of bipedality - PMC
Mechanism and Structures: Humanoids and Quadrupeds
Insights into the evolution of human bipedalism from …
Human Quadrupeds, Primate Quadrupedalism, and Uner Tan …
Biomechanics and the origins of human bipedal walking: The last …
Modifications of the locomotor system in habitually quadrupedal …