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"POVR." (n.d.). Fullformexpand.com. Retrieved February 28, 2026, from https://www.fullformexpand.com/povr/point-optimized-variance-ratio.
POVR. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/povr/point-optimized-variance-ratio (Accessed: 28 February 2026).