Bank of America is still dealing with its legacy mortgage issues which have been a regular source of concern for the company over the last 3 years.

FORBES: Taking Stock of Bank of America's Mortgage Business

Like UPS, these companies have the trucks (their product lines) and the drivers (their sales force) and what they need now is a regular source of new packages (products) to deliver to customers.

FORBES: Software PACMAN

The poll, in which party members elect representatives to serve on the executive, has in past years been a regular source of embarrassment to the leadership with Labour's rank and file spurning slates of Blairite candidates in favour of left-wingers.

BBC: Labour row looms on internal polls

Among the pieces of evidence collected from Boylston Street during the past week was a tree that Dzhokhar Tsarnaev may have leaned against before the bombing, according to a source who receives regular intelligence briefings on the Boston bombings.

CNN: SHARE THIS

The increasing US drone attack on militants inside Pakistan along the Afghan border is also a continuing source of antagonism - there are regular complaints of civilian casualties.

BBC: Pakistan: US aid cut will not harm fight against terror

At the same time these sites are a source of casual work or even a regular pipeline for people who can build business from prices where margin is always at risk.

FORBES: Where Is The Digital Workforce Growing Fastest?

The studios have discovered that great books can also be a source for great screenplays, churning out a regular diet of adaptations of 19th-century fiction.

ECONOMIST: Life in Los Angeles

Its housing guide is a good source of advertising revenue since housing management companies generally have regular cash flow.

FORBES: Wharton Start-Up, Chattersource, Helps Students Find Housing, Haircuts

In a postseason that has seen the quality of the Rangers' play fluctuate from game to game and often from period to period Lundqvist had been a source of reliable excellence, just as he had through the regular season.

WSJ: For Lundqvist and Rangers, a Bad Time to Look Vulnerable