TY  - JOUR
AU  - Kristijan Cafuta
AU  - Igor Klep
AU  - Janez Povh
TI  - Rational sums of hermitian squares of free noncommutative polynomials
	
JO  - Ars Mathematica Contemporanea
PY  - 2015
SP  - 243
EP  - 259
VL  - 9
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.26493/1855-3974.518.768/
DO  - 10.26493/1855-3974.518.768
LA  - en
ID  - 10_26493_1855_3974_518_768
ER  -