diff --git a/src/Numerics/LinearAlgebra/Storage/DenseColumnMajorMatrixStorage.cs b/src/Numerics/LinearAlgebra/Storage/DenseColumnMajorMatrixStorage.cs
index e21c503b..370d24bb 100644
--- a/src/Numerics/LinearAlgebra/Storage/DenseColumnMajorMatrixStorage.cs
+++ b/src/Numerics/LinearAlgebra/Storage/DenseColumnMajorMatrixStorage.cs
@@ -3,7 +3,7 @@ using MathNet.Numerics.Properties;
 
 namespace MathNet.Numerics.LinearAlgebra.Storage
 {
-    internal class DenseColumnMajorMatrixStorage<T> : MatrixStorage<T>
+    public class DenseColumnMajorMatrixStorage<T> : MatrixStorage<T>
         where T : struct, IEquatable<T>, IFormattable
     {
         // [ruegg] public fields are OK here
diff --git a/src/Numerics/LinearAlgebra/Storage/DiagonalMatrixStorage.cs b/src/Numerics/LinearAlgebra/Storage/DiagonalMatrixStorage.cs
index f4c9b46a..23be0ad1 100644
--- a/src/Numerics/LinearAlgebra/Storage/DiagonalMatrixStorage.cs
+++ b/src/Numerics/LinearAlgebra/Storage/DiagonalMatrixStorage.cs
@@ -4,7 +4,7 @@ using MathNet.Numerics.Properties;
 
 namespace MathNet.Numerics.LinearAlgebra.Storage
 {
-    internal class DiagonalMatrixStorage<T> : MatrixStorage<T>
+    public class DiagonalMatrixStorage<T> : MatrixStorage<T>
         where T : struct, IEquatable<T>, IFormattable
     {
         // [ruegg] public fields are OK here
diff --git a/src/Numerics/LinearAlgebra/Storage/SparseCompressedRowMatrixStorage.cs b/src/Numerics/LinearAlgebra/Storage/SparseCompressedRowMatrixStorage.cs
index a0cc2832..7a245fa4 100644
--- a/src/Numerics/LinearAlgebra/Storage/SparseCompressedRowMatrixStorage.cs
+++ b/src/Numerics/LinearAlgebra/Storage/SparseCompressedRowMatrixStorage.cs
@@ -4,7 +4,7 @@ using MathNet.Numerics.Properties;
 
 namespace MathNet.Numerics.LinearAlgebra.Storage
 {
-    internal class SparseCompressedRowMatrixStorage<T> : MatrixStorage<T>
+    public class SparseCompressedRowMatrixStorage<T> : MatrixStorage<T>
         where T : struct, IEquatable<T>, IFormattable
     {
         // [ruegg] public fields are OK here