The phrase "as a complementary source" is correct and usable in written English.
It can be used when referring to an additional resource that enhances or supports the main source of information or material.
Example: "The report should be reviewed alongside the previous studies, as a complementary source of data."
Alternatives: "as an additional resource" or "as a supplementary source".
Deposition of Bi-oxide films using Bi(mmp 3 (mmp=OCMe2CH2OMe) indicates similar decomposition behaviour to the Sr–Ta alkoxide precursor, demonstrating its suitability as a complementary source of Bi for SBT.
Building on this idea, this paper proposes the use of geolocated tweets as a complementary source of information for urban planning applications, focusing on the characterization of land use.
The correct classification of rainfall distribution zones is crucial for the management and allocation of water resources in the Pearl River Delta to meet the increasing demand of domestic and industrial usage not only within the basin but also as a complementary source for Hong Kong.
These results show the role of camel milk as a complementary source of food and income for pastoral households.
SIRENE starts from this suggestion and considers VGI as a complementary source of information in the SDI framework.
It could be used as a complementary source of information in the detection of mineral deposition, such as iron and copper [24].
With many of the MAPs gathered from the wild, collection and sale is providing a complementary source of cash for many extremely poor rural households.
A complementary source of information are phylogenies of binding sites.
The government of Bangladesh and other low- and middle income countries can consider health insurance using occupational solidarity as a potential complementary source of funding along with indirect taxes for financing healthcare of informal sector workers.
Amaranth seeds are considered as an excellent complementary source of food protein due to their balanced amino acid composition.
In anaerobic digestion, crude glycerol is employed as the principal carbon source (Hutňan et al. 2013) or as a complementary carbon source (Siles López et al. 2009) to improve denitrification processes (Bodík et al. 2009) or methane generation (Álvarez et al. 2010).
