(Nowak 2018, and as noted)
Adult elephants move with one basic gait, where three feet are almost always on the ground.
Eltringham (1991)
Fernando and Lande (2000)
Hart et al. (2001)
McKay (1973)
Moss (1990)
Moss et al. (2011)
O'Connell-Rodwell (2001)
Payne & Langbauer (1992)
Poole (1996)
Pringle (2008)
Rasmussen and Krishnamurthy (2000)
Santipelli & Suprahman (1986)
Schulte (2006)
Shoshani & Eisenberg (1982)
Sukumar (1989)