TY  - RPRT
TI  - Markarian 421's Unusual Satellite Galaxy
AU  - Gorham, P.
AU  - Zee, L.
AU  - Unwin, S.
AU  - Jacobs, C.
PY  - 1999
UR  - https://ntrs.nasa.gov/citations/20060040821
ID  - 20060040821
ER  -