scientific article (publication date: 28 February 2017)
author: Daniel Mietchen, Lyubomir Penev, Vishwas Chavan, Gregor Hagedorn, Vincent Smith, David Shotton, Éamonn Ó Tuama, Teodor Georgiev, Pavel Stoev, Scott Edmunds, Quentin J. Groom, David Remsen, Viktor Senderov