• On integrability of observable space for discrete-time polynomial control systemsKawano, Yu; Kotta, ÜlleIEEE transactions on automatic control2015 / p. 1987-1991 https://doi.org/10.1109/TAC.2014.2365685 https://www.scopus.com/sourceid/17339 https://www.scopus.com/record/display.uri?eid=2-s2.0-84931386358&origin=inward&txGid=f587dcc1009f67fae5dde541a2412acd https://jcr.clarivate.com/jcr-jp/journal-profile?journal=IEEE%20T%20AUTOMAT%20CONTR&year=2015 https://www.webofscience.com/wos/woscc/full-record/WOS:000356871400028