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diff --git a/include/gudhi/Simplex_tree/Simplex_tree_node_explicit_storage.h b/include/gudhi/Simplex_tree/Simplex_tree_node_explicit_storage.h
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+/*    This file is part of the Gudhi Library. The Gudhi library
+ *    (Geometric Understanding in Higher Dimensions) is a generic C++
+ *    library for computational topology.
+ *
+ *    Author(s):       Clément Maria
+ *
+ *    Copyright (C) 2014  INRIA Sophia Antipolis-Méditerranée (France)
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#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_