Xie, H., Gao, W., Xing, B., Heitjan, D. F., Hedeker, D., & Yuan, C. (2018). Measuring the Impact of Nonignorable Missingness Using the R Package isni. Comput Methods Programs Biomed.

Xie, Hui, Weihua Gao, Baodong Xing, Daniel F. Heitjan, Donald Hedeker, و Chengbo Yuan. "Measuring the Impact of Nonignorable Missingness Using the R Package Isni." Comput Methods Programs Biomed 2018.

Xie, Hui, et al. "Measuring the Impact of Nonignorable Missingness Using the R Package Isni." Comput Methods Programs Biomed 2018.