@article{otobo1978,
  title={The reproductive biology of Pellonula afzeliusi Johnels, and Sierrathrissa leonensis thys Audenaerde in Lake Kainji, Nigeria},
  author={Fidelis O. Otobo},
  year={1978},
  journal={Hydrobiologia},
  doi={10.1007/bf00018741},
  url={https://doi.org/10.1007/bf00018741}
}