diff --git a/src/commonMain/kotlin/ru/landgrafhomyak/db/serdha0/user_commons/construction/row_reference.kt b/src/commonMain/kotlin/ru/landgrafhomyak/db/serdha0/user_commons/construction/row_reference.kt
new file mode 100644
index 0000000..1b990f0
--- /dev/null
+++ b/src/commonMain/kotlin/ru/landgrafhomyak/db/serdha0/user_commons/construction/row_reference.kt
@@ -0,0 +1,25 @@
+@file:JvmName("_RowReferenceKt")
+
+package ru.landgrafhomyak.db.serdha0.user_commons.construction
+
+import kotlin.jvm.JvmName
+import ru.landgrafhomyak.db.serdha0.api.misc.DatabaseType
+import ru.landgrafhomyak.db.serdha0.api.table.ForeignRowReference
+import ru.landgrafhomyak.db.serdha0.api.table.RowId
+import ru.landgrafhomyak.db.serdha0.api.table.Table
+import ru.landgrafhomyak.db.serdha0.api.table.TableConstructor
+
+public fun <tUE : Any> TableConstructor.Scope<tUE>.nullableSelfRowReference(
+	columnName: String,
+	onDelete: ForeignRowReference.OnDelete,
+): ForeignRowReference<tUE, tUE, RowId<tUE>?, DatabaseType.Nullable<RowId<tUE>, DatabaseType.ROW_ID<tUE>>> =
+	this.selfRowReference(columnName, this.types.nullableOf(this.rowIdColumn.type), onDelete)
+
+
+public fun <tUE : Any, ttUE : Any> TableConstructor.Scope<tUE>.nullableForeignRowReference(
+	columnName: String,
+	toTable: Table<ttUE, *>,
+	onDelete: ForeignRowReference.OnDelete,
+): ForeignRowReference<tUE, ttUE, RowId<ttUE>?, DatabaseType.Nullable<RowId<ttUE>, DatabaseType.ROW_ID<ttUE>>> =
+	this.foreignRowReference(columnName, this.types.nullableOf(this.types.ROW_ID(toTable)), toTable, onDelete)
+