diff --git a/src/app/+item-page/simple/entity-types/journal-volume/journal-volume-page-fields.component.ts b/src/app/+item-page/simple/entity-types/journal-volume/journal-volume-page-fields.component.ts
index 09e43cf427..7549fbd2ff 100644
--- a/src/app/+item-page/simple/entity-types/journal-volume/journal-volume-page-fields.component.ts
+++ b/src/app/+item-page/simple/entity-types/journal-volume/journal-volume-page-fields.component.ts
@@ -21,7 +21,14 @@ import { isNotEmpty } from '../../../../shared/empty.util';
  * The component for displaying metadata and relations of an item with entity type Journal Volume
  */
 export class JournalVolumePageFieldsComponent extends EntityPageFieldsComponent {
+  /**
+   * The journals related to this journal volume
+   */
   journals$: Observable<Item[]>;
+
+  /**
+   * The journal issues related to this journal volume
+   */
   issues$: Observable<Item[]>;
 
   constructor(
diff --git a/src/app/+item-page/simple/entity-types/orgunit/orgunit-page-fields.component.ts b/src/app/+item-page/simple/entity-types/orgunit/orgunit-page-fields.component.ts
index e1a2c7abe8..28385b5d54 100644
--- a/src/app/+item-page/simple/entity-types/orgunit/orgunit-page-fields.component.ts
+++ b/src/app/+item-page/simple/entity-types/orgunit/orgunit-page-fields.component.ts
@@ -21,9 +21,19 @@ import { isNotEmpty } from '../../../../shared/empty.util';
  * The component for displaying metadata and relations of an item with entity type Organisation Unit
  */
 export class OrgUnitPageFieldsComponent extends EntityPageFieldsComponent implements OnInit {
-
+  /**
+   * The people related to this organisation unit
+   */
   people$: Observable<Item[]>;
+
+  /**
+   * The projects related to this organisation unit
+   */
   projects$: Observable<Item[]>;
+
+  /**
+   * The publications related to this organisation unit
+   */
   publications$: Observable<Item[]>;
 
   constructor(
diff --git a/src/app/+item-page/simple/entity-types/person/person-page-fields.component.ts b/src/app/+item-page/simple/entity-types/person/person-page-fields.component.ts
index db74c6e1af..8c502a6ccf 100644
--- a/src/app/+item-page/simple/entity-types/person/person-page-fields.component.ts
+++ b/src/app/+item-page/simple/entity-types/person/person-page-fields.component.ts
@@ -22,10 +22,29 @@ import { isNotEmpty } from '../../../../shared/empty.util';
  * The component for displaying metadata and relations of an item with entity type Person
  */
 export class PersonPageFieldsComponent extends EntityPageFieldsComponent {
+  /**
+   * The publications related to this person
+   */
   publications$: Observable<Item[]>;
+
+  /**
+   * The projects related to this person
+   */
   projects$: Observable<Item[]>;
+
+  /**
+   * The organisation units related to this person
+   */
   orgUnits$: Observable<Item[]>;
+
+  /**
+   * The applied fixed filter
+   */
   fixedFilter$: Observable<string>;
+
+  /**
+   * The query used for applying the fixed filter
+   */
   fixedFilterQuery: string;
 
   constructor(
diff --git a/src/app/+item-page/simple/entity-types/project/project-page-fields.component.ts b/src/app/+item-page/simple/entity-types/project/project-page-fields.component.ts
index 976b3ccec0..54bed63e6d 100644
--- a/src/app/+item-page/simple/entity-types/project/project-page-fields.component.ts
+++ b/src/app/+item-page/simple/entity-types/project/project-page-fields.component.ts
@@ -21,8 +21,19 @@ import { isNotEmpty } from '../../../../shared/empty.util';
  * The component for displaying metadata and relations of an item with entity type Project
  */
 export class ProjectPageFieldsComponent extends EntityPageFieldsComponent implements OnInit {
+  /**
+   * The people related to this project
+   */
   people$: Observable<Item[]>;
+
+  /**
+   * The publications related to this project
+   */
   publications$: Observable<Item[]>;
+
+  /**
+   * The organisation units related to this project
+   */
   orgUnits$: Observable<Item[]>;
 
   constructor(
diff --git a/src/app/+item-page/simple/entity-types/publication/publication-page-fields.component.ts b/src/app/+item-page/simple/entity-types/publication/publication-page-fields.component.ts
index 5fcccea10e..8f2d980ec3 100644
--- a/src/app/+item-page/simple/entity-types/publication/publication-page-fields.component.ts
+++ b/src/app/+item-page/simple/entity-types/publication/publication-page-fields.component.ts
@@ -22,9 +22,24 @@ import {
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
 export class PublicationPageFieldsComponent extends EntityPageFieldsComponent implements OnInit {
+  /**
+   * The authors related to this publication
+   */
   authors$: Observable<Item[]>;
+
+  /**
+   * The projects related to this publication
+   */
   projects$: Observable<Item[]>;
+
+  /**
+   * The organisation units related to this publication
+   */
   orgUnits$: Observable<Item[]>;
+
+  /**
+   * The journal issues related to this publication
+   */
   journalIssues$: Observable<Item[]>;
 
   constructor(