@article{article, title  = {{Accessing hidden and hard to reach populations: snowball research strategies}},

 url = {{}},

 year = {{2001}},

 month = {{1}},

 author = {{Atkinson R and Flint J}},

 volume = {{33}},

 journal = {{Social Â鶹ÊÓƵ Update}},

 note = {{Accessed on 2025/06/27}}}