Embedded Adventures - Tutorials - Multiplexing LED displays
Romux
Custom 7 Segment digit multiplexing - LEDs and Multiplexing - Arduino Forum
Multiplexed seven-segment display (8 digits)
TinyMips - multiplexed seven-segment display
How to modify the design of a 7-segment display multiplexing system in figure 6.49 (digital electronics Floyd) to accommodate two additional digits - Quora