TY  - GEN 
T1  - Generalized spectrum of second order differential operators
A1  - Gergelits, Tomáš
A1  - Nielsen, Bjørn Fredrik
A1  - Strakoš, Zdeněk
Y1  - 2020
M1  - Preprint project = NCMM
M1  - Preprint year = 2020
M1  - Preprint number = 02
M1  - Preprint ID = NCMM/2020/02
ER  -