Sorry, I am a German engineer, so my English language skills are quite poor :D. I am writing a scientific paper and I have several sentences as the following example
- In [1] the definition proposed in [2] has been expanded by ...
The numbers [1] and [2] appear exactly like that in the final manuscript and are literature references, e.g.,
[1] Last name, First name (2016): Very interesting new paper, Journal 1.
[2] Last name, First name (2000): Very interesting old paper, Journal 2.
My problem is that I don't know if I have to put a comma after the literature reference [1] in the sentence above, i.e.,
- In [1], the definition proposed in [2] has been expanded by ...
My "feelings" tell me that [1] is crucial information which can not be taken out of the sentence, since then
- The definition proposed in [2] has been expanded by ...
gives information which can not be found. For this reason I would NOT put a comma after [1] but that's only a "feeling" of a German engineer, so not very reliable :D. What is correct in this case?