pygost/gost3410.py     | 6 ++++--
 pygost/gost3410_vko.py | 4 ++--

diff --git a/pygost/gost3410.py b/pygost/gost3410.py
index 4292cb4e98ad1f60487060ea3c2481be52871f7af38a4a460b6152b08c57ef9d..3b595d1254c5c273c7eccd53b21ecd7f0459f358611e6118ef26a4d2a3a5b1e3 100644
--- a/pygost/gost3410.py
+++ b/pygost/gost3410.py
@@ -231,7 +231,7 @@     :param digest: digest for signing
     :type digest: bytes, 32 or 64 bytes
     :param rand: optional predefined random data used for k/r generation
     :type rand: bytes, 32 or 64 bytes
-    :returns: signature
+    :returns: signature, BE(S) || BE(R)
     :rtype: bytes, 64 or 128 bytes
     """
     size = MODE2SIZE[mode]
@@ -305,7 +305,7 @@     return lm == r
 
 
 def prv_unmarshal(prv):
-    """Unmarshal private key
+    """Unmarshal little-endian private key
 
     :param bytes prv: serialized private key
     :rtype: long
@@ -318,6 +318,7 @@     """Marshal public key
 
     :type pub: (long, long)
     :rtype: bytes
+    :returns: LE(X) || LE(Y)
     """
     size = MODE2SIZE[mode]
     return (long2bytes(pub[1], size) + long2bytes(pub[0], size))[::-1]
@@ -326,6 +327,7 @@
 def pub_unmarshal(pub, mode=2001):
     """Unmarshal public key
 
+    :param pub: LE(X) || LE(Y)
     :type pub: bytes
     :rtype: (long, long)
     """
diff --git a/pygost/gost3410_vko.py b/pygost/gost3410_vko.py
index 51ff8adea8f2127bd454e08ec6ac12de5c1d01e992cb340ba1c8627254f9fa3a..5d562358f8f2d1b52c59a7d9c1fd0c7652e7cfe6ca3fa25d9c8ef84ed0267e80 100644
--- a/pygost/gost3410_vko.py
+++ b/pygost/gost3410_vko.py
@@ -26,7 +26,7 @@
 def ukm_unmarshal(ukm):
     """Unmarshal UKM value
 
-    :type ukm: bytes
+    :type ukm: little-endian bytes
     :rtype: long
     """
     return bytes2long(ukm[::-1])
@@ -55,7 +55,7 @@     hash output.
     """
     return GOST341194(
         kek(curve, prv, pub, ukm, mode=2001),
-        "id-GostR3411-94-CryptoProParamSet",
+        sbox="id-GostR3411-94-CryptoProParamSet",
     ).digest()