- Luz M. DeAlba, Jason Grout, In-Jae Kim, Steve Kirkland, Judith J. McDonald and Amy Yielding
*Minimum rank of powers of trees.*

Electron. J. Linear Algebra 23 (2012) 151-163. - Travis Peters
*Positive semidefinite maximum nullity and zero forcing number.*

Electron. J. Linear Algebra 23 (2012) pp. 815-830.