Galunska, B. T., Gerova, D. I., Galcheva, S. V. and Iotova, V. M. (2016) “Association between vitamin D status and obesity in Bulgarian pre-pubertal children: a pilot study”, International Journal of Research in Medical Sciences, 4(2), pp. 361–368. doi: 10.18203/2320-6012.ijrms20160284.