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Any source that you use in your work, be it academic literature, websites, or even tv programs, needs to be cited. Similar projects are extremely relevant to what you're doing, and therefore if you...
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#4: Attribution notice removed
Source: https://writers.stackexchange.com/a/39561 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/39561 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
Any source that you use in your work, be it academic literature, websites, or even tv programs, needs to be cited. Similar projects are extremely relevant to what you're doing, and therefore if your source on them is a website rather than an academic work, it should definitely be cited. When you cite a website, you include its name, link, date content was written (if stated), and the date you accessed it (since content might later be changed). Or did you mean, do you need to include a link to the academic article you're citing? In that case, no, you don't. Your department would have a standard for how they want citations formatted (formats vary somewhat between fields, and between journals etc. in the same field). You can ask your advisor, he'll point you to how exactly sources should be cited.