The Unidimensional Relationship Closeness Scale (URCS): reliability and validity evidence for a new measure of relationship closeness
Psychological Assessment (2012) - Comment
pubmed: 22082035  doi: 10.1037/a0026265  issn: 1939-134x  issn: 1040-3590 

Jayson L. Dibble, Timothy R. Levine, Hee Sun Park