E. Ghahremani, L. Vafajoo, and A. Shafiekhani, “Distance-Based Colorimetric µPADs for Nickel Detection: Effect of Cover Materials, Reagent Loading, and Data Normalization”, Int. Nano Lett., vol. 16, no. 1, Mar. 2026, doi: 10.57647/inl.2026.1601.02.