"Anomalous" optical gamma-ray burst afterglows are common: Two z similar to 4 bursts, GRB 060206 and GRB 0602101
Journal article published in 2007 by
Kz Stanek,
X. Dai 
,
Jl Prieto,
D. An,
Pm Garnavich,
Ml Calkins,
J. Serven,
G. Worthey,
H. Hao,
A. Dobrzycki,
C. Howk,
T. Matheson
,
Jl Prieto,
D. An,
Pm Garnavich,
Ml Calkins,
J. Serven,
G. Worthey,
H. Hao,
A. Dobrzycki,
C. Howk,
T. Matheson
