For citations:

Alexeeva L.L., Protopopova N.V., Fatkullina I.B. Heart rate variability in pregnant women with arterial hypertension. "Arterial’naya Gipertenziya" ("Arterial Hypertension"). 2011;17(4):366-371. (In Russ.) https://doi.org/10.18705/1607-419X-2011-17-4-366-371