Where To Start Finding Articles For Literature Review To Write A Research Proposal?

M

This might sound stupid but I'm a loss to find some free sites or paid ones for that matter that will allow me access to thesis, articles and papers to write my Phd research proposal in the are or management/marketing, I'm in the initial stages of coming up with a topic for Phd and to write a full research proposal on it. Any help would be much appreciated as I feel like I'm stuck even before starting,

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if you get stuck with the paywall, scihub is great
https://sci-hub.tw/

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