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DB2 Locking and Concurrency for Java Developers - MC Press Online
DB2 for z/OS Locking for Application Developers Part 6 - Triton Consulting
Alfred DB2-B Smart Door Lock Deadbolt Touchscreen Keypad, Pin Code + Key Entry + Bluetooth, Up to 20 Pin Codes (Black) - Amazon.com
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Alfred DB2-B smart lock review: Better, but still troublesome | TechHive
Alfred DB2-B Smart Door Lock Deadbolt Touchscreen Keypad, Pin Code + Key Entry + Bluetooth, Up to 20 Pin Codes (Black) - Amazon.com