Sztenkiel, D.
Foltyn, M.
Mazur, G. P.
Adhikari, R.
Kosiel, K.
Gas, K.
Zgirski, M.
Kruszka, R.
Jakiela, R.
Li, Tian
Piotrowska, A.
Bonanni, A.
Sawicki, M.
Dietl, T.
Article History
Received: 7 May 2016
Accepted: 12 September 2016
First Online: 26 October 2016
Competing interests
: The authors declare no competing financial interests.