When size matters: effectiveness of three endemic African stingless bees as watermelon pollinators

1. Kasiera, W.
2. Pozo, M.I.
3. Toroitich, K.
4. Karanja, R.
5. Odhiambo, M.
6. Jaramillo, J.
7. Hundt, B.
8. van Langevelde, F.
9. Nkoba, K.