For citations:

Novikova D.S., Popkova T.V., Lisitsyna T.A., Nasonov E.L. PERSPEKTIVY OPREDELENIYa VARIABEL'NOSTI RITMA SERDTsA I DLITEL'NOSTI INTERVALA Q-T PRI REVMATOIDNOM ARTRITE I SISTEMNOY KRASNOY VOLChANKE. Rheumatology Science and Practice. 2010;48(5):54-66. (In Russ.) https://doi.org/10.14412/1995-4484-2010-732