diff --git a/physics/views.py b/physics/views.py
index 3d273543..a16083d7 100644
--- a/physics/views.py
+++ b/physics/views.py
@@ -327,21 +327,21 @@ class ExamCreate(RevisionMixin, LoginRequiredMixin, CreateView):
         form.instance.author.add(self.request.user.id)
         return super().form_valid(form)
 
-class ExamClone(ExamCloneMixin, ExamCreate):
+class ExamClone(AuthorOrCheckerRequiredMixin, ExamCloneMixin, ExamCreate):
     """Clone exam view"""
 
-class QuestionView(LoginRequiredMixin, SingleTableMixin, FilterView):
+class QuestionView(AuthorOrCheckerRequiredMixin, LoginRequiredMixin, SingleTableMixin, FilterView):
     model = Question
     table_class = QuestionTable
     template_name = "physics/question_view.html"
 
     filterset_class = QuestionFilter
 
-class UserAnswerView(LoginRequiredMixin, DetailView):
+class UserAnswerView(AuthorOrCheckerRequiredMixin, LoginRequiredMixin, DetailView):
     model = CidUserAnswer
 
 
-class UserAnswerTableView(LoginRequiredMixin, SingleTableMixin, FilterView):
+class UserAnswerTableView(AuthorOrCheckerRequiredMixin, LoginRequiredMixin, SingleTableMixin, FilterView):
     model = CidUserAnswer
     table_class = UserAnswerTable
     template_name = "physics/user_answer_question_view.html"