Fix doxygen
diff --git a/include/amcl/commitments.h b/include/amcl/commitments.h
index 25e7c75..b637ee2 100644
--- a/include/amcl/commitments.h
+++ b/include/amcl/commitments.h
@@ -34,8 +34,8 @@
 {
 #endif
 
-#define COMMITMENTS_OK   0   /** < Success */
-#define COMMITMENTS_FAIL 81  /** < Invalid Commitment */
+#define COMMITMENTS_OK   0   /**< Success */
+#define COMMITMENTS_FAIL 81  /**< Invalid Commitment */
 
 /* NM Commitment Scheme API */
 
diff --git a/include/amcl/factoring_zk.h b/include/amcl/factoring_zk.h
index bd8a81e..6f9d100 100644
--- a/include/amcl/factoring_zk.h
+++ b/include/amcl/factoring_zk.h
@@ -45,8 +45,8 @@
 
 #define FACTORING_ZK_B 16 /**< Security parameter, length in bytes */
 
-#define FACTORING_ZK_OK   0  /** < Proof successfully verified */
-#define FACTORING_ZK_FAIL 91 /** < Invalid proof */
+#define FACTORING_ZK_OK   0  /**< Proof successfully verified */
+#define FACTORING_ZK_FAIL 91 /**< Invalid proof */
 
 /** \brief Prove knowledge of the modulus m in ZK
  *
diff --git a/include/amcl/mta.h b/include/amcl/mta.h
index 824989e..ea975b6 100644
--- a/include/amcl/mta.h
+++ b/include/amcl/mta.h
@@ -120,7 +120,7 @@
  *
  *  <ol>
  *  <li> \f$ e \in_R [0, \ldots, q] \f$
- *  <ol>
+ *  </ol>
  *
  *  @param RNG               csprng for random generation
  *  @param E                 Destination octet for the challenge.
@@ -481,7 +481,7 @@
  *  <li> \f$ t  = h_1^{y}h_2^{\sigma}            \text{ }\mathrm{mod}\text{ }\tilde{N} \f$
  *  <li> \f$ w  = h_1^{\gamma}h_2^{\tau}         \text{ }\mathrm{mod}\text{ }\tilde{N} \f$
  *  <li> \f$ v  = c1^{\alpha}g^{\gamma}\beta^{N} \text{ }\mathrm{mod}\text{ }N^2 \f$
- *  <li> \f$ U  = \alpha.G
+ *  <li> \f$ U  = \alpha.G \f$
  *  </ol>
  *
  *  @param RNG         csprng for random generation
@@ -507,6 +507,7 @@
  *  @param mod         Public BC modulus of the verifier
  *  @param C1          Base Paillier Ciphertext
  *  @param C2          New Paillier Ciphertext to prove knowledge and range
+ *  @param X           Public exponent of the associated DLOG to prove knowledge
  *  @param c           Commitment of the prover
  *  @param E           Destination challenge
  */