• On a cosine operator function framework of approximation processes in banach spaceKivinukk, Andi; Saksa, Anna; Zeltser, MariaFilomat2019 / p. 4213-4228 https://doi.org/10.2298/FIL1913213K https://www.scopus.com/sourceid/19900192450 https://www.scopus.com/record/display.uri?eid=2-s2.0-85077677690&origin=inward&txGid=e4b38d2a8efeb245b0d39899ba63f264 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=FILOMAT&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000502092100018
  • Siinustest ja koosinustest :[vestlus matemaatik T. Arakuga]Arak, TaivoRahva Hääl1984 / lk. [?] https://www.ester.ee/record=b1072826*est