The determination of par levels from absorption coefficient profiles at 490 nm

od Barnard, AH, Zaneveld, JRV, Scott-Pegau, W, Mueller, JL, Maske, H, Lara-Lara, R, Álvarez-Borrego, S, Cervantes-Duarte, R, Valdez-Holguín, E
Izdano 1999