On Questions No One Can Answer

Pablo Neruda, lines from his book, Extravagaria, quoted by William O'Daly, Introduction in: Neruda P. The Book of Questions, translated by William O'Daly. Port Townsend, Washington: Copper Canyon Press 2001, p. x.

Roy D.J. Palliative care in a technological age. J Palliat Care 2004; 20(4): 267–268.

Neruda P. The Book of Questions, translated by William O'Daly. Port Townsend, Washington: Copper Canyon Press, 2001, inside cover.

Poincaré H. quoted by BB Mandelbrot. The Fractal Geometry of Nature. San Francisco: WH Freeman and Company, 1983; pp. 2–3.

Neruda, Pablo, op. cit.: p. 44.

Neruda, Pablo, op. cit.: p. 28.