 Quantum mysteries revisited by N. David Mermin

American Journal of Physics 58, 731–734. Inspected original paper, received 30 March 1990 and accepted 28 April 1990; publication is August 1990.

Section III and equation (5) give the GHZ Pauli-product contradiction. The paper chooses the opposite three-qubit relative sign from the plus-GHZ state used in this wiki; the concept article explicitly calculates the signs for its own state.