E. M. Badr ( 2014), Complete Reference for Graceful Labeling of Cyclic Snakes, Technical Report 2, 2014, Benha Unveristy, Faculty of Computers and Informatics, http://www.bu.edu.eg/staff/alsayedbadr7

E. M. Badr ( 2014), Complete Reference for Odd Graceful Labeling of Cyclic Snakes, Technical Report 1, 2014, Benha Unveristy, Faculty of Computers and Informatics,

Simulation Models of Sustainable Building Materials using Optimization Techniques and Machine Learning