Skučas, M., I. Grigaliūnienė, and R. Labrencas. “Episodes of Reentry Type Biopotentials Exited in Isolated Atrium by Competing Sources”. Elektronika Ir Elektrotechnika, vol. 61, no. 5, May 2005, pp. 53-57, https://eejournal.ktu.lt/index.php/elt/article/view/10448.