Thorsteinn I. Sigfusson
发表
Nikolai Sochugov,
Thorsteinn I. Sigfusson,
A. A. Solovyev,
2012
.
Helgi Thor Ingason,
Thorsteinn I. Sigfusson,
T. Sigfusson,
2014
.
Helgi Thor Ingason,
Thorsteinn I. Sigfusson,
T. Sigfusson,
2010
.
Thorsteinn I. Sigfusson,
Pertti Koskinen,
Sirje Vares,
2017
.
Thorsteinn I. Sigfusson,
Valdimar K. Jónsson,
Ragnar L. Gunnarsson,
1992
.
Reidun Dahl Schlanbusch,
Thorsteinn I. Sigfusson,
Sirje Vares,
2016
.
Thorsteinn I. Sigfusson,
T. Sigfusson,
2009
.
Thorsteinn I. Sigfusson,
Bragi Árnason,
T. Sigfusson,
2000
.