TY - CHAP AU - Hazewinkel, Michel TI - On invariants and moduli for linear time-varying systems BT - Analyse des systèmes AU - Collectif T3 - Astérisque PY - 1980 DA - 1980/// IS - 75-76 PB - Société mathématique de France UR - http://archive.numdam.org/item/AST_1980__75-76__115_0/ UR - https://zbmath.org/?q=an%3A0459.93035 UR - https://www.ams.org/mathscinet-getitem?mr=581708 LA - en ID - AST_1980__75-76__115_0 ER -