diff --git a/lisa/lisa-analyses/src/main/java/it/unive/lisa/analysis/numeric/Pentagons.java b/lisa/lisa-analyses/src/main/java/it/unive/lisa/analysis/numeric/Pentagons.java
index 182dce0a7..972190cb5 100644
--- a/lisa/lisa-analyses/src/main/java/it/unive/lisa/analysis/numeric/Pentagons.java
+++ b/lisa/lisa-analyses/src/main/java/it/unive/lisa/analysis/numeric/Pentagons.java
@@ -29,16 +29,41 @@
 import it.unive.lisa.util.representation.StringRepresentation;
 import it.unive.lisa.util.representation.StructuredRepresentation;
 
+/**
+ * The pentagons abstract domain, a weakly relational numerical abstract domain. This abstract
+ * domain captures properties of the form of x ⋲ [a, b] ∧ x < y. It is more precise than the
+ * well known interval domain, but it is less precise than the octagon domain.
+ * It is implemented as a {@link ValueDomain}.
+ * 
+ * @author <a href="mailto:luca.negrini@unive.it">Luca Negrini</a>
+ * @author <a href="mailto:vincenzo.arceri@unipr.it">Vincenzo Arceri</a>
+ */
 public class Pentagons implements ValueDomain<Pentagons>, BaseLattice<Pentagons> {
 
+	/**
+	 * The interval environment.
+	 */
 	private final ValueEnvironment<Interval> intervals;
+	
+	/**
+	 * The upper bounds environment.
+	 */
 	private final ValueEnvironment<UpperBounds> upperBounds;
 
+	/**
+	 * Builds the pentagons.
+	 */
 	public Pentagons() {
 		this.intervals = new ValueEnvironment<>(new Interval()).top();
 		this.upperBounds = new ValueEnvironment<>(new UpperBounds(true)).top();
 	}
 
+	/**
+	 * Builds the pentagons.
+	 * 
+	 * @param intervals the underlying {@link ValueEnvironment<Interval>}
+	 * @param upperBounds the underlying {@link ValueEnvironment<UpperBounds>}
+	 */
 	public Pentagons(ValueEnvironment<Interval> intervals, ValueEnvironment<UpperBounds> upperBounds) {
 		this.intervals = intervals;
 		this.upperBounds = upperBounds;
diff --git a/lisa/lisa-analyses/src/main/java/it/unive/lisa/analysis/numeric/UpperBounds.java b/lisa/lisa-analyses/src/main/java/it/unive/lisa/analysis/numeric/UpperBounds.java
index ea581282c..305f653de 100644
--- a/lisa/lisa-analyses/src/main/java/it/unive/lisa/analysis/numeric/UpperBounds.java
+++ b/lisa/lisa-analyses/src/main/java/it/unive/lisa/analysis/numeric/UpperBounds.java
@@ -25,23 +25,57 @@
 import it.unive.lisa.util.representation.StringRepresentation;
 import it.unive.lisa.util.representation.StructuredRepresentation;
 
+/**
+ * The upper bounds abstract domain. It is implemented as
+ * a {@link BaseNonRelationalValueDomain}.
+ * 
+ * @author <a href="mailto:luca.negrini@unive.it">Luca Negrini</a>
+ * @author <a href="mailto:vincenzo.arceri@unipr.it">Vincenzo Arceri</a>
+ */
 public class UpperBounds implements BaseNonRelationalValueDomain<UpperBounds>, Iterable<Identifier> {
 
+	/**
+	 * The abstract top element.
+	 */
 	private static final UpperBounds TOP = new UpperBounds(true);
+	
+	/**
+	 * The abstract bottom element.
+	 */
 	private static final UpperBounds BOTTOM = new UpperBounds(new TreeSet<>());
 
+	/**
+	 * The flag to set abstract top state.
+	 */
 	private final boolean isTop;
+	
+	/**
+	 * The set containing the bounds.
+	 */
 	private final Set<Identifier> bounds;
 
+	/**
+	 * Builds the upper bounds.
+	 */
 	public UpperBounds() {
 		this(true);
 	}
 	
+	/**
+	 * Builds the upper bounds.
+	 * 
+	 * @param isTop {@code true} if the abstract domain is top; otherwise {@code false}.
+	 */
 	public UpperBounds(boolean isTop) {
 		this.bounds = null;
 		this.isTop = isTop;
 	}
 
+	/**
+	 * Builds the upper bounds.
+	 * 
+	 * @param bounds the bounds to set
+	 */
 	public UpperBounds(Set<Identifier> bounds) {
 		this.bounds = bounds;
 		this.isTop = false;
@@ -168,10 +202,22 @@ public Iterator<Identifier> iterator() {
 		return bounds.iterator();
 	}
 
+	/**
+	 * Checks if this bounds contains a specified identifier of a program variable.
+	 * 
+	 * @param id the identifier to check
+	 * @return {@code true} if this bounds contains the specified identifier; otherwise, {@code false}. 
+	 */
 	public boolean contains(Identifier id) {
 		return bounds != null && bounds.contains(id);
 	}
 
+	/**
+	 * Adds the specified identifier of a program variable in the bounds.
+	 * 
+	 * @param id the identifier to add in the bounds.
+	 * @return the updated bounds.
+	 */
 	public UpperBounds add(Identifier id) {
 		Set<Identifier> res = new HashSet<>();
 		if (!isTop() && !isBottom())