@inbook{inbook, title  = {{A Theory of Class}},

 publisher = {{Springer London}},

 url = {{}},

 year = {{1997}},

 month = {{1}},

 author = {{Simons AJH}},

 doi = {{10.1007/978-1-4471-0973-0_4}},

 isbn = {{9783540761327}},

 pages = {{44-56}},

 note = {{Accessed on 2024/12/22}}}