dboc(1) on Linux
The text 07982c09dbc9, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy) shipped it. The page shows this text now.
Diagonal Born-Oppenheimer Correction using HF and CI wave functions.