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diff --git a/src/Simplex_tree/include/gudhi/Simplex_tree/Simplex_tree_node_explicit_storage.h b/src/Simplex_tree/include/gudhi/Simplex_tree/Simplex_tree_node_explicit_storage.h
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+/*    This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
+ *    See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
+ *    Author(s):       Clément Maria
+ *
+ *    Copyright (C) 2014 Inria
+ *
+ *    Modification(s):
+ *      - YYYY/MM Author: Description of the modification
+ */
+
+#ifndef SIMPLEX_TREE_SIMPLEX_TREE_NODE_EXPLICIT_STORAGE_H_
+#define SIMPLEX_TREE_SIMPLEX_TREE_NODE_EXPLICIT_STORAGE_H_
+
+#include <vector>
+
+namespace Gudhi {
+
+/* \addtogroup simplex_tree
+ * Represents a node of a Simplex_tree.
+ * @{
+ */
+
+/*
+ * \brief Node of a simplex tree with filtration value
+ * and simplex key.
+ *
+ * It stores explicitely its own filtration value and its own Simplex_key.
+ */
+template<class SimplexTree>
+struct Simplex_tree_node_explicit_storage : SimplexTree::Filtration_simplex_base, SimplexTree::Key_simplex_base {
+  typedef typename SimplexTree::Siblings Siblings;
+  typedef typename SimplexTree::Filtration_value Filtration_value;
+  typedef typename SimplexTree::Simplex_key Simplex_key;
+
+  Simplex_tree_node_explicit_storage(Siblings * sib = nullptr,
+                                     Filtration_value filtration = 0)
+      : children_(sib) {
+    this->assign_filtration(filtration);
+  }
+
+  /*
+   * Assign children to the node
+   */
+  void assign_children(Siblings * children) {
+    children_ = children;
+  }
+
+  /* Careful -> children_ can be NULL*/
+  Siblings * children() {
+    return children_;
+  }
+
+ private:
+  Siblings * children_;
+};
+
+/* @} */  // end addtogroup simplex_tree
+}  // namespace Gudhi
+
+#endif  // SIMPLEX_TREE_SIMPLEX_TREE_NODE_EXPLICIT_STORAGE_H_