TY  - JOUR
AU  - Barvínek, Erich
TI  - Linear differential transformations of the 2nd order as a representation of an abstract model
JO  - Archivum mathematicum
PY  - 1980
SP  - 189
EP  - 198
VL  - 16
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ARM_1980__16_4_a1/
LA  - en
ID  - ARM_1980__16_4_a1
ER  -