Korsakienė, Renata, Vytautas Tvaronavičius, and Alminas Mačiulis. 2008. “Customer Relationship Management in Real Estate Companies: The Research of Advantages and Restrictive Factors”. Business: Theory and Practice 9 (3):190-98. https://doi.org/10.3846/1648-0627.2008.9.190-198.