... further discussed in the Discussion or (in Discussion) [scientific writing]

In a scientific journal paper, when something is briefly discussed in one section (e.g., Introduction) and want to say it is further discussed in the discussion section (which is usually the last section of the main text), which one is more appropriate? Or are there other standards? Discussion section here is just an example and could be any other section (e.g., Materials and Methods).

... is further discussed in the Discussion

... is further discussed in Discussion

Similarly,

(See Discussion for details)

(See the Discussion for details)