Lianghao Dai and Margarete Boos (2017)

How Much Sharing Is Enough? Cognitive Patterns in Building Interdisciplinary Collaborations

Social Network Analysis: Interdisciplinary Approaches and Case Studies:41.

A social network is made up of nodes and ties (Wasserman and Faust, 1994). The nodes 
can be individuals, teams, or organizations, while ties represent interpersonal or 
interorganizational relationships, like trust, friendships, and investments.