The stability of specific ethane conformers (such as the staggered conformation being more stable than the eclipsed) is a fundamental, textbook chemical concept explained by hyperconjugation and steric effects, making citation unnecessary for this basic structural fact.
The claim states that hyperconjugation stabilizes specific ethane conformers. Ethane's rotational barrier and conformational stability (staggered vs. eclipsed) are standard foundational concepts in introductory and advanced chemistry, representing common knowledge in the discipline. Therefore, citing specific research papers is not required.