@book {TN_libero_mab2,
author
=
{
Sheard, Michael
}
,
title
=
{
Mental toughness
the mindset behind sporting achievement
}
,
edition
=
{
2. ed.
}
,
publisher
=
{
Routledge
}
,
isbn
=
{
9780415578967
}
,
year
=
{
2013
}
,
address
=
{
London [u.a.]
}
,
}
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