Social Resources and Strength of Ties: Structural Factors in Occupational Status Attainment
研究了社会资源（如关系人的职业地位）和关系强度如何影响个人职业地位的获得，发现弱关系通过提供更丰富的社会资源对职业提升更有效。
Nan Lin, Walter M. Ensel, John C. Vaughn, Social Resources and Strength of Ties: Structural Factors in Occupational Status Attainment, American Sociological Review, Vol. 46, No. 4 (Aug., 1981), pp. 393-405