diff --git a/journals/helpers.py b/journals/helpers.py
index fb08cf89eaf8e0ec12dc5bee07ff9d54f8efa618..c31314def9187347421ba9fd7251603d5dd688f5 100644
--- a/journals/helpers.py
+++ b/journals/helpers.py
@@ -2,27 +2,16 @@ from .exceptions import JournalNameError, PaperNumberError
 
 
 def journal_name_abbrev_citation(journal_name):
-    if journal_name == 'SciPost Physics':
+    if journal_name == 'SciPostPhys':
         return 'SciPost Phys.'
-    elif journal_name == 'SciPost Physics Select':
+    elif journal_name == 'SciPostPhysSel':
         return 'SciPost Phys. Sel.'
-    elif journal_name == 'SciPost Physics Lecture Notes':
+    elif journal_name == 'SciPostPhysLectNotes':
         return 'SciPost Phys. Lect. Notes'
     else:
         raise JournalNameError(journal_name)
 
 
-def journal_name_abbrev_doi(journal_name):
-    if journal_name == 'SciPost Physics':
-        return 'SciPostPhys'
-    elif journal_name == 'SciPost Physics Select':
-        return 'SciPostPhysSel'
-    elif journal_name == 'SciPost Physics Lecture Notes':
-        return 'SciPostPhysLectNotes'
-    else:
-        raise JournalNameError(journal_name)
-
-
 def paper_nr_string(nr):
     if nr < 10:
         return '00' + str(nr)
diff --git a/journals/models.py b/journals/models.py
index 67c9d178fda1efb1908453221c0972021d6654e6..28a3404ae7271c2361979d9cb2a1ca13672207a8 100644
--- a/journals/models.py
+++ b/journals/models.py
@@ -6,7 +6,7 @@ from django.urls import reverse
 
 from .constants import SCIPOST_JOURNALS, SCIPOST_JOURNALS_DOMAINS,\
                        STATUS_DRAFT, STATUS_PUBLISHED, ISSUE_STATUSES
-from .helpers import paper_nr_string, journal_name_abbrev_doi, journal_name_abbrev_citation
+from .helpers import paper_nr_string, journal_name_abbrev_citation
 from .managers import IssueManager, PublicationManager
 
 from scipost.constants import SCIPOST_DISCIPLINES, SCIPOST_SUBJECT_AREAS
@@ -37,9 +37,6 @@ class Journal(models.Model):
     def get_abbreviation_citation(self):
         return journal_name_abbrev_citation(self.name)
 
-    def get_abbreviation_doi(self):
-        return journal_name_abbrev_doi(self.name)
-
 
 class Volume(models.Model):
     in_journal = models.ForeignKey(Journal, on_delete=models.CASCADE)
@@ -94,13 +91,6 @@ class Issue(models.Model):
         return self.start_date <= timezone.now().date() and\
                self.until_date >= timezone.now().date()
 
-    def period(self):
-        text = 'up to {{ until_month }} {{ year }}'
-        template = Template(text)
-        context = Context({'until_month': self.start_date.strftime('%B'),
-                           'year': self.until_date.strftime('%Y')})
-        return template.render(context)
-
 
 class Publication(models.Model):
     accepted_submission = models.OneToOneField('submissions.Submission', on_delete=models.CASCADE)