Good style for frequent references to some paper
Check your target journal's style guide or advice to authors, but my approach is to use the citation format the first time I mention it and then just mention the authors by name or pronoun when I refer to them later. E.g:


  Our work compares with [A &amp; B, 2000] on the following:
    - The approach presented by A &amp; B makes (x) assumption on (...)
    - The (something) differ from those of A &amp; B on (...)
    - Performance of X was not reported by A &amp; B


Even that can get redundant. You might say say:


  Throughout the following section, we compare our work to [A &amp; B, 2000]. In their work, they make assumptions about (X) ... Additionally, (Y) differs between A &amp; B's method and our because ... They also do not present performance of (Z) in their work. 


It depends a bit on your own style, but my approach is always a bit more conversational.