How to properly reference a source when almost exact copy?
Copying is of course not good. But, it is always possible to use a quote. This can be done by either use quotes or in your case to state that you are providing a copy of the list provided by the author.. In your case I think you can easily say something like "Following "cited author" (yyyy) we can define the problem as ..." and then follow up by rewriting the list you mention. It should then be very clear that what you write follows what the cited author has written. The exact phrasing might be slightly different but along the lines I outlined.