Sroiwatana, C., R. Sachdav, M. Sripramote, and N. Kaewpila. “Quality of Histological Sampling of Endometrium: a Comparison between the Wallach Endocell Sampler and Formal Fractional Curettage”. Vajira Medical Journal : Journal of Urban Medicine, vol. 46, no. 2, Sept. 2011, pp. 87-95, https://he02.tci-thaijo.org/index.php/VMED/article/view/177.