(1)
Kohli, N.; Singh, R. 3-Nitroso-4-Hydroxy-5,6-Benzocoumarin (NHBC) As a Reagent for the Spectrophotometric Determination of copper(II) in Alloys. Chimia 1974, 28 (11), 661. https://doi.org/10.2533/chimia.1974.661.