I wonder if there are any arguments for or against the use of "some of us" in a research paper. In a paper by "(myself), S. E. Cond, and A. U. Thor" about an "Update on previous research", I wonder if it would be OK to write
Some of us have previously shown that ... .  (myself), S. Other, and A. U. Thor. Previous Research. Fancy J.
I usually write "we" to speak about the set of authors of the current manuscript, so I don't see any problem myself. But there may be, so: are there any rules I should follow?
This probably depends on the area of research, but in mathematics, the sciences, or engineering, "A subset of the authors..." might be better. "Some of us..." is a little informal for my tastes.