Similar title to Diekmann, O., Gyllenberg, M., Huang, H., Kirkilionis, M., Metz, J.A.J., & Thieme, H.R. (2001). On the formulation and analysis of general deterministic structured population models. II. Nonlinear theory. Journal of Mathematical Biology 43 (2) 157-189. 10.1007/s002850170002.