Magyar, Melinda
Sipka, Gábor
Kovács, László
Ughy, Bettina
Zhu, Qingjun
Han, Guangye
Špunda, Vladimír
Lambrev, Petar H.
Shen, Jian-Ren
Garab, Győző
Article History
Received: 29 June 2017
Accepted: 31 January 2018
First Online: 9 February 2018
Competing Interests
: The authors declare no competing interests.