@article{Gillman1993,
author = {Gillman, M. and Bullock, J.M. and Silvertown, J. and Hill, B.C.},
title= {A density-dependent model of Cirsium vulgare population dynamics using field-estimated parameter values},
year = {1993},
doi = {10.1007/BF00317743},
journal = {Oecologia },
volume = {96},
number = {2},
pages = {282--289},
}