N. Maracilu, C. et al. 2022. The effect of serum magnesium, calcium, and potassium levels on the event of calf muscle cramps, according to the perspective of pregnant women in the third-trimester of pregnancy : Pengaruh Kadar Magnesium, Kalsium, dan Kalium Serum Terhadap Terjadinya Kram Otot Betis, Menurut Perspektif Ibu Hamil di Trimester Ketiga Kehamilan. Indonesian Journal of Obstetrics and Gynecology. 10, 4 (Oct. 2022), 194–199. DOI:https://doi.org/10.32771/inajog.v10i4.1586.