Optimizing total ammonia–nitrogen concentration for enhanced microbial fuel cell performance in landfill leachate treatment: a bibliometric analysis and future directions. - Ishaq, Aliyu; Said, Mohd Ismid Mohd; Azman, Shamila Binti; Abdulwahab, Mohd Firdaus; Jagun, Zainab Toyin (Environmental Science & Pollution Research, 2023)