“... dispersión en Cerro Tololo (Junio de 1991) y en dispersión media en el CASLEO (Agosto de 1992). Este material...”

“... research of southern symbiotic stars, carried out in CASLEO, with 2.15m telescope, during 1990 and 1991...”

“... spectrograph, from June 26 through July 1, 1991, through the phase interval 0.93P - 0.28P. The spectral region...”

“... over in the Hertzsprung±Russell (HR) diagram and by 1991 its luminosity had faded by a factor of ,30...”