 The Physiological Principle of Minimum Work. I. The Vascular System and the Cost of Blood Volume by Cecil D. Murray

Proceedings of the National Academy of Sciences 12, 207–214. Original byline: Cecil D. Murray, Department of Biology, Bryn Mawr College.

Inspected original scanned paper, printed pp. 209–212, equations 1–7: fixed-flow pumping cost, volume maintenance cost, radius optimization and cubic flow-radius law. The concept article supplies the branching consequence and an equal-daughter example.