Khidir R. Sharaf and Didar A. Ali, Nullity of t-Tupple Graphs. journal = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology. January 2014, vol. 86(2). 314 - 324 [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/9997480.