The publication in 1953 of the work Topic and Jurisprudence by Theodor Viehweg, has marked a milestone for the notion of legal topic, transforming it into a recurring concept for legal theory, especially in relation to legal methodology and also for public law.
Huidobro Salas, R. (2014). Topic and general principles of law. Revista De Derecho Público, (71), Págs. 241–249. https://doi.org/10.5354/rdpu.v0i71.35695