1. The finite element method for neutron transport;Ackroyd,1975
2. The why and how of finite elements;Ackroyd;Ann. Nucl. Energy,1981
3. A finite element method for diffusion theory embracing nodal and difference methods;Ackroyd;Prog. Nucl. Energy,1986
4. Hybrid principles for neutron transport;Ackroyd,1986
5. Projection and conservation methods for neutron transport;Ackroyd,1987