 According to "Current Contents", by 1986, the Weak Ties paper had become a citation classic, being one of the most cited papers in sociology.In a related line of research in 1969, anthropologist Bruce Kapferer, published "Norms and the Manipulation of Relationships in a Work Context" after doing field work in Africa.In the document, he postulated the existence of "multiplex ties", characterized by multiple contexts in a relationship.