@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 2024/12/25}}}