Krichbaum, T. P., & Quirrenbach, A. (1990). 43 GHz-VLBI observations of 3C273 after a flux density outburst in 1988. Astronomy & astrophysics, 237(1), .
Chicago Style (17th ed.) CitationKrichbaum, Thomas P., and Andreas Quirrenbach. "43 GHz-VLBI Observations of 3C273 After a Flux Density Outburst in 1988." Astronomy & Astrophysics 237, no. 1 (1990).
MLA (9th ed.) CitationKrichbaum, Thomas P., and Andreas Quirrenbach. "43 GHz-VLBI Observations of 3C273 After a Flux Density Outburst in 1988." Astronomy & Astrophysics, vol. 237, no. 1, 1990.
Warning: These citations may not always be 100% accurate.