1. B. Blanknov, Friday smorgasbord: school is out version, available at
https://reefbuilders.com/2016/11/11/friday-smorgasbord-58/
. Accessed 19 Mar 2019
2. Lee’s Birdwatching adventures plus, mixed flock of birds flying in a V formation, available at
https://leesbird.com/2013/07/05/
. Accessed 19 Mar 2019
3. Renaisscience, Mill of humanity: swarms, emergence and us, available at
https://medium.com/@renaisscience/mill-of-humanity-swarms-emergence-and-us-b8f9ef50a11e/
. Accessed 19 Mar 2019
4. L. Felzmann, How the science of swarms can help us fight cancer and predict the future, available at
https://www.wired.com/2013/03/powers-of-swarms/
. Accessed 19 Mar 2019
5. M.M. Waldrop, Complexity: The Emerging Science at the Edge of Order and Chaos (Simon & Schuster, New York, 1992)