Manmohan Singh's Top Security (SPG) Cover Withdrawn, Given CRPF Security
Special Protection Group - Wikipedia
Manmohan Singh: Government withdraws SPG cover to ex-PM Manmohan Singh
What makes the SPG India's finest protection force - Rediff.com
Prime Minister Singh Jeered Over India's Coal Deals - The New York Times
Government removes SPG cover of former PM Manmohan Singh; Z+ security cover to continue
235 SPG Commando security of Manmohan Singh, will spend 19 million!
Simply put: How the forces protect VIPs
Rahul Gandhi SPG withdrawn for Gandhi family - Telegraph India