Before revision: URL It is one of the most frequently used models for primary production estimation due to its ability to be applied to chlorophyll a data from satellites, and its relatively simple URL Chlorophyll a is a common measure of primary production, as it is a main component of photosynthesis.
After revision: <ref>Photosynthetic rates derived from satellite-based chlorophyll concentration<ref> It is one of the most frequently used models for primary production estimation due to its ability to be applied to chlorophyll a data from satellites, and its relatively simple design.<ref>Modification of the vertically generalized production model for the turbid waters of Ariake Bay, southwestern Japan<ref> Chlorophyll a is a common measure of primary production, as it is a main component of photosynthesis.