"Blue Carbon: The Role of Healthy Oceans in Binding Carbon : a Rapid Response Assessment" by Christian Nellemann, Emily Corcoran, UNEP/Earthprint, (p. 23), 2009.
"Credo". Essay by Arthur C. Clarke (1991), later published in Arthur C. Clarke "Greetings, Carbon-Based Bipeds!: Collected Essays, 1934-1998" (p. 360), 1990.