To cite package ‘sandwichrand’ in publications use:

  Wang B (2026). sandwichrand: Allocation Sequences by Sandwich Mixed
  Randomization. R package version 1.0.0.
  https://github.com/wangbshun/sandwichrand

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {sandwichrand: Allocation Sequences by Sandwich Mixed Randomization},
    author = {Bingshun Wang},
    year = {2026},
    note = {R package version 1.0.0},
    url = {https://github.com/wangbshun/sandwichrand},
  }

  Wang B, Wang X, Ni C, Xie J, Wu S, Wu Y, Shen Y, Dong Z, Lv W, He Y
  (2026). Reducing selection bias risk to enhance RCT validity:
  sandwich mixed randomization outperforms permuted block design. BMC
  Medical Research Methodology, 26(1), 152.
  doi:10.1186/s12874-026-02877-2

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Reducing selection bias risk to enhance RCT validity: sandwich mixed randomization outperforms permuted block design},
    author = {Bingshun Wang and Xiaojin Wang and Changyu Ni and Jinliang Xie and Siqi Wu and Yejun Wu and Yingmin Shen and Zhongxun Dong and Wenwen Lv and Yunting He},
    journal = {BMC Medical Research Methodology},
    year = {2026},
    volume = {26},
    number = {1},
    pages = {152},
    doi = {10.1186/s12874-026-02877-2},
  }