Parry, Walter. "Examples of growth series of torus bundle groups" Journal of Group Theory, 10.2 (2007): 245-266. Retrieved 25 May. 2013, from doi:10.1515/JGT.2007.020

Parry, W. (2007). Examples of growth series of torus bundle groups. Journal of Group Theory, 10(2), pp. 139-266. Retrieved 25 May. 2013, from doi:10.1515/JGT.2007.020

Parry, Walter. 2007. Examples of growth series of torus bundle groups. Journal of Group Theory. 10(2): 139-266. Retrieved 25 May. 2013, from doi:10.1515/JGT.2007.020