diff --git a/seminar/models.py b/seminar/models.py
index 566b9d8d..15367d3a 100644
--- a/seminar/models.py
+++ b/seminar/models.py
@@ -11,6 +11,7 @@ from django.utils.encoding import force_unicode
 from django.utils.text import slugify
 from django.core.urlresolvers import reverse
 from django.core.cache import cache
+from django.core.exceptions import ObjectDoesNotExist
 from imagekit.models import ImageSpecField, ProcessedImageField
 from imagekit.processors import ResizeToFit, Transpose
 
@@ -28,6 +29,7 @@ from reversion import revisions as reversion
 
 from seminar.utils import roman
 
+
 class SeminarModelBase(models.Model):
 
     class Meta:
@@ -382,6 +384,15 @@ class Cislo(SeminarModelBase):
             return None
         return cs[i]
 
+    @classmethod
+    def get(cls, rocnik, cislo):
+        try:
+            r = Rocnik.objects.get(rocnik=rocnik)
+            c = r.cisla.get(cislo=cislo)
+        except ObjectDoesNotExist:
+            return None
+        return c
+
 
 @reversion.register(ignore_duplicate_revisions=True)
 @python_2_unicode_compatible