Hubble Space Telescope and ground-based observations of SN 1993J and SN1998S: CNO processing in the progenitors
Journal article published in 2005 by
C. Fransson,
Pm Challis,
Ra Chevalier,
Av Filippenko,
Rp Kirshner,
C. Kozma,
Dc Leonard,
T. Matheson,
E. Baron 
,
P. Garnavich,
S. Jha,
B. Leibundgut,
P. Lundqvist,
Csj Pun,
Lf Wang
and other authors.
,
P. Garnavich,
S. Jha,
B. Leibundgut,
P. Lundqvist,
Csj Pun,
Lf Wang
and other authors.
