Kałużny, K., A. Kałużna, J. Budzyński, W. Hagner, B. Kochański, W. Żukow, A. Bronisz, and M. Hagner-Derengowska. “Effect of a Ten-Week Nordic Walking Exercise Program on Serum Electrolyte Concentration and Plasma Acid-Base Balance in Postmenopausal Women With Overweight or Obesity”. Journal of Education, Health and Sport, vol. 6, no. 12, Dec. 2016, pp. 353-64, https://apcz.umk.pl/JEHS/article/view/4065.