Sintering routes for zirconia doped hardmetalsVoltšihhin, Nikolai; Cura, M. Erkin; Hussainova, Irina; Hannula, Simo-PekkaProceedings of the 8th International Conference of DAAAM Baltic Industrial Engineering, 19-21st April 2012, Tallinn, Estonia. 22012 / p. 765-770 : ill Spectroscopic and phase-stabilisation properties of pure and rare-earth ions activated ZrO2 and HfO2Lange, Sven2010 https://www.ester.ee/record=b2592707*est Toward high temperature tough ceramicsHussainova, Irina; Yung, Der-Liang; Voltšihhin, Nikolai; Traksmaa, Rainer; Hannula, Simo-PekkaECCM15 - 15th European Conference on Composite Materials : Venice, Italy, 24-28 June 20122012 / [8] p http://www.escm.eu.org/eccm15/data/assets/178.pdf