Referring to papers by myself and others in my thesis In citing a paper by myself and others in my thesis, suppose my surname is A and that I have a paper jointly with B and C.  I want to cite it, and normally, I would write


  A, B, and C showed that this can be done [ABC15].


However, in my thesis, it feels more natural to say


  Together with B and C, we showed that this can be done [ABC15].


Which is better?  Are there better options?

In other words, should I pretend that A is some random dude when it is in fact the author of the thesis the reader is currently reading?

For context:  This is a thesis in theoretical computer science/algorithmic graph theory/parameterized algorithms/complexity.  I prefer to use "we" as is usual in mathematical texts.
Personally I feel (and I know that there are many who might disagree) that it is perfectly fine to use 'I' and 'we' here. I think that obsessively sticking to passive voice makes papers and theses less readable. After all, you did do the work. Why hide behind the passive voice? My suggestion would be to go with option 2:


  Together with B and C, we showed that this can be done [ABC15].