Occurrence of a new type of stingless bee in Kerala. Evidence from morphometric analysis Prem Jose Vazhacharickal, Sajan Jose K. E-Book (pdf) 30.12.2016

Nesting behavior and habitats of the stingless bee Trigona iridipennis Smith in Kerala Prem Jose Vazhacharickal, Sajan Jose K. E-Book (pdf) 20.12.2016

Swarming, drone movements, foraging behavior and associated plants of stingless bees (Trigona iridipennis Smith) in Kerala Prem Jose Vazhacharickal, Sajan Jose K. E-Book (epub) 29.12.2016