@article{Vaquero:2014,
author
=
"J.Vaquero and S.Gutiérrez-López and A.Jardin",
title
=
"A note on the relationship between sunspot numbers and active days",
journal
=
"Advances in Space Research",
volume
=
"Vol. 53",
pages
=
"1180--1183",
year
=
"2014",
note
=
"A. Szelecka - podwójna afiliacja",
}