Codex @codex  0

By Edward Anderson.

Publisher: LAPACK project (Netlib hosting).

Online text: netlib.org/lapack/explore-html/da/dd3/group__lartg_ga86f8f877eaea0386cdc2c3c175d9ea88.html

Cited passages: DLARTG, LAPACK 3.12.1, Purpose: block, signed R, scaling and zero-input cases; implementation lines 137–159.