ON THE IDENTIFICATION OF THE HIGH-LATITUDE X-RAY SOURCE 2A 1219+305WILSON AS; WARD MJ; AXON DJ et al.1979; MONTH. NOT. R. ASTR. SOC.; GBR; DA. 1979; VOL. 187; NO 1; PP. 109-115; (8 P.); BIBL. 21 REF.Article

THE SPECTRAL FLUX DISTRIBUTION OF THE CANDIDATE BL LACERTAE OBJECT 1218+304 (=-2A 1219+305)LEDDEN JE; O'DELL SL; STEIN WA et al.1981; ASTROPHYS. J.; ISSN 0004-637X; USA; DA. 1981; VOL. 243; NO 1; PART. 1; PP. 47-52; BIBL. 27 REF.Article

CCD PHOTOMETRY OF THE BL LACERTAE OBJECTS 1218+304, 1219+28, AND 1727+50: POINT SOURCES, ASSOCIATED NEBULOSITY, AND BROAD-BAND SPECTRAWEISTROP D; SHAFFER DB; MUSHOTZKY RF et al.1981; ASTROPHYS. J.; ISSN 0004-637X; USA; DA. 1981; VOL. 249; NO 1; PART. 1; PP. 3-12; BIBL. 48 REF.Article

VARIABLE X-RAY SPECTRA OF BL LACERTAE OBJECTS: HEAO 1 OBSERVATIONS OF PKS 0548-322 AND 2A 1219+305WORRALL DM; BOLDT EA; HOLT SS et al.1981; ASTROPHYS. J.; ISSN 0004-637X; USA; DA. 1981; VOL. 243; NO 1; PART. 1; PP. 53-59; BIBL. 32 REF.Article

X-RAY EMITTING BL LACERTAE OBJECTS LOCATED BY THE SCANNING MODULATION COLLIMATOR EXPERIMENT ON HEA01SCHWARTZ DA; DOXSEY RE; GRIFFITHS RE et al.1979; ASTROPHYS. J.; USA; DA. 1979; VOL. 229; NO 2 PART. 2; PP. L53-L57; BIBL. 43 REF.Article

The ultraviolet to X-ray continua of BL Lac objectsGEORGE, I. M; WARWICK, R. S; MCHARDY, I. M et al.Monthly Notices of the Royal Astronomical Society. 1988, Vol 235, Num 3, pp 787-795, issn 0035-8711Article

Upper limits from hard X-ray observations of five BL Lacertae objectsBEZLER, M; GRUBER, D. E; ROTHSCHILD, R. E et al.The Astrophysical journal. 1988, Vol 334, Num 2, pp 995-1000, issn 0004-637X, 1Article