As your article states, there are a variety of ways the UK could reverse the decision to withdraw from the EU.
I suspect what will happen in the long run is the UK will go through the process of withrawal, the citizens of the UK will find it solves very little of their complaints, and the UK will apply for reinstatement within 10-15 years.
It should not, in a million years, happen. One vote. Period. Citizens can't be coddled. If they didn't know what was going on that is their own fault. Best they didn't make it to the polling place. Informed people voted it seems.