The discussion focuses on the need for primary sources related to various empirical material models, including those by Ludwik, Holomon, and others, for scientific research on elastoplastic materials. The researcher emphasizes the importance of understanding both the equations and their underlying rationale, indicating that this is not for a school assignment but for serious academic work. They mention the challenge of locating early 20th-century publications and express gratitude for any assistance in accessing these sources. Two articles by Belov and Golovina from 2019 are highlighted as recent contributions to the analysis of the Ramberg-Osgood model. The conversation underscores the significance of formulating original mathematical models in advancing material science research.