1. Baldissera S, Ferrante G, Quarchioni E, Minardi V, Possenti V, Carrozzi G, Masocco M, Salmaso S, The PASSI Coordinating group (2014) Field substitution of nonresponders can maintain sample size and structure without altering survey estimates. Τηε experience of the Italian behavioral risk factors surveillance system (PASSI). Ann Epidemiol 24:241–245
2. Chapman DW (1983) The impact of substitution on survey estimates. In: Madow WG, Olkin I, Rubin DB (eds) Incomplete data in sample surveys, 2nd edn. Academic, New York, pp 45–61
3. Chapman DW (2003) To substitute or not to substitute that is the question. Surv Stat 48:32–34
4. Chapman DW, Roman AM (1985) An investigation of substitution for an RDD survey. In: JSM Proceedings, survey research methods section. American Statistical Association, Alexandria, VA, pp 269–274.
http://www.amstat.org/sections/srms/Proceedings/papers/1985_048.pdf
. Accessed 29 Apr 2017
5. Chiu WF, Yucel RM, Zanutto E, Zaslavsky AM (2005) Using matched substitutes to improve imputations for geographically linked databases. Surv Methodol 31:65–72