Fulde, Peter Max Planck Institute for the Physics of Complex Systems, Max Planck Society;
http://aappsbulletin.org/myboard/read.php?id=89&Page=1&Board=apctp&FindIt=&FindText= (Verlagsversion)
Fulde, P. (2019). Wavefunctions for extended electron Systems. AAPPS bulletin, 29(1), 50-57. doi:10.22661/AAPPSBL.2019.29.1.50.