公式
https://www.lenovo.com/jp/ja/notebooks/thinkpad/x-series/ThinkPad-X13-Intel-/p/22TPX13X3N1

ThinkPad X13 レビュー
https://thehikaku.net/pc/lenovo/20ThinkPad-X13.html

ThinkPad X13 Yoga レビュー
https://thehikaku.net/pc/lenovo/20ThinkPad-X13-Yoga.html

CPU性能比較
https://pcrecommend.com/cpu/

リーベイツ
https://www.rebates.jp/lenovo-jp