I have read some papers who referenced like this

" [23] showed an innovative approach" instead of one of the most common way "author X in 2017 showed an innovative approach [23]" .

My question is that way of referencing

a) completely wrong ?

b) aggressive but ok ?

c) other

and should I do it also ? Cause it saves space and reduces unnecessary writings like "author X in 2017". And this comes in handy esp for journal/conferences with page limits

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