Hippopotamus amphibius. The IUCN Red List of Threatened Species 2008: e.T10103A3163790.doi: 10.2305/IUCN.
Los hipopotamos (Hippopotamus amphibius) en Colombia.
Seasonal variation of thermoregulatory behavior in the Hippopotamus (Hippopotamus amphibius).
Chemical restraint of the Nile hippopotamus (Hippopotamus amphibius) in captivity.
Cooling and freezing of epididymal sperm in the common hippopotamus (Hippopotamus amphibius).
Observations on the reproductive physiological status of mature herd bulls, bachelor bulls and young bulls in the hippopotamus Hippopotamus amphibius amphibius Linnaeus.
Relationships between reproduction and environment in the hippopotamus Hippopotamus amphibius in the Kruger National Park.