3Hesp P, Mcl^vchlan A. Morphology? dynainies, ecology and fauna ofArctolheca populi folia and Gazmiia rigens nabkha dunes[Jl. Journal of AridEnvironments,2000,44:155-172.
4Mac Kenzie, David S. Timber press pocket guide to ground covers[,M].Portland:Timber Press,2006.