The phrase "a certain source of" is correct and usable in written English.
It can be used when referring to a specific origin or cause of something, often in a vague or general sense.
Example: "The researchers identified a certain source of error in their calculations that needed to be addressed."
Alternatives: "a specific origin of" or "a particular cause of".
Curiously, one certain source of them is also at BBC Leeds: the station's TV reporter and presenter Ian White is a TVAM anorak and runs the official archive and museum.
For patients with multiple culture results within the 48-hour timeframe, cultures from a skin source or venipuncture were prioritized over blood cultures drawn from a line, and certain sources of skin cultures with a high risk of contamination such as "swabs" were excluded.
◦ Certainly ◦ Probably ◦ Probably not ◦ Certainly not ◦ I don't know We now want to ask you a few questions about certain sources of information in the event of an influenza pandemic.
However, if we want to move beyond the a priori privileging of certain sources of solidarity, we need to analyse concrete instances of living together in diversity from the perspective of how different sources of solidarity are combined and articulated in specific contexts.
"You can tweak any of those algorithms to favor certain sources of information, based on what you're trying to do," Saft said.
"Federal agencies pressure the states, most of which have comprehensive radiation programs, to provide protection from certain sources of radiation while ignoring other sources".
Her technique was simple: Rather than renew some of the governmental programs under which the original crew was employed, Dorr allowed certain sources of financing to lapse.
"The crisis," wrote the Basel Committee on Banking Supervision, "illustrated how quickly and severely liquidity risks can crystallize and certain sources of funding can evaporate, compounding concerns related to the valuation of certain assets and capital liquidity".
That's what really scares us about certain sources of oil what the money we pay for it might eventually buy.
