Barak, Shashi; Kompella, Varun J.; Kaipa, Krishnanand N.; Ghose, Debasish: 'Push-pull glowworm swarm optimization algorithm for multimodal functions' (Control, Robotics and Sensors, 2018), 'Swarm Intelligence -Volume 2: Innovation, new algorithms and methods', Chap. 7, pp. 185-219, DOI: 10.1049/PBCE119G_ch7
IET Digital Library, https://digital-library.theiet.org/;jsessionid=1hct9l1c3wgj5.x-iet-live-01content/books/10.1049/pbce119g_ch7