Information Processing Letters
Information Processing Letters > 2015 > 115 > 4 > 492-501
Information Processing Letters > 2015 > 115 > 9 > 677-683
Information Processing Letters > 2015 > 115 > 10 > 769-772
Information Processing Letters > 2015 > 115 > 11 > 812-816
Information Processing Letters > 2015 > 115 > 11 > 866-871