While the UK Independence Party leader, Brexit advocate, and Member of the European Parliament Nigel Farage has undiplomatically asserted that his European Parliamentary colleagues have “never done a proper job” , there will be a great deal of work to be done by the many British and European bureaucrats recently under scrutiny by the victorious “Leave” movement. The EUBusiness News Service, an independent but well-established reporting service for EU commercial and legal matters, provides a useful Article 50 Factsheet on what should happen once the UK notifies the EU of its intention to leave (whenever that may be, but from that point negotiations must conclude within a two-year period or depart without negotiated terms). While much is undecided, the text of Article 50 of the Lisbon Treaty is provided succinctly at this site; it begins by stating that “…Any Member State may decide to withdraw from the Union in accordance with its own constitutional requirements.” The official text of the Lisbon Treaty and news on Brexit are available at the EU’s Europa web site.
Numerous news outlets and blogs will teem with information, but just a couple to follow might include the Global Government Forum, a blog for civil servants across jurisdictions (and featuring Sir Paul Jenkins, former head of the UK Government Legal Service, warning of the massive task ahead to undo 40 years of a constitutional arrangement), and the Global Legal Post, a news summary source that warns of a possible British exit from the European human rights regime and court in Strasbourg as well- one that is NOT part of the EU but of a different European body, the 47-member Council of Europe.
In addition to the resources in a previous post just prior to the vote, you may wish to look at UC Berkeley government documents guide on Brexit; there may be other similar guides to this event as the post-referendum process unfolds.