P. A. Thakkar, K. Yagnik, N. T. Parmar, R. R. Das, and U. P. Thakkar, “Observer Variability in Head Circumference Measurement Using Routine Versus Non-Stretchable Tapes in Children”, J. Nepal Paedtr. Soc., vol. 37, no. 3, pp. 238–243, Jun. 2018.