Lippiatt, B.
and Ruegg, R.
(1990),
Energy prices and discount factors for life-cycle cost analysis 1990 ::annual supplement to NBS Handbook 135 and NBS Special Publication 709, , National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.IR.85-3273-4
(Accessed November 4, 2024)