diff --git a/41.md b/41.md
index 748f9dd4..3488f9c0 100644
--- a/41.md
+++ b/41.md
@@ -46,14 +46,14 @@ The following abbreviations are used:
 
 - `SK` secret key (32 bytes)
 - `PK` public key
-- `ESK` extended secret key, consisting of private key part (32 bytes) and 'chain code' part (32 bytes), as defined in (BIP-32)[https://bips.xyz/32].
-- `EPK` extended public key, consisting of public key part (33 bytes) and 'chain code' part (32 bytes), as defined in (BIP-32)[https://bips.xyz/32].
+- `ESK` extended secret key, consisting of private key part (32 bytes) and 'chain code' part (32 bytes), as defined in [BIP-32](https://bips.xyz/32).
+- `EPK` extended public key, consisting of public key part (33 bytes) and 'chain code' part (32 bytes), as defined in [BIP-32](https://bips.xyz/32).
 - `CC` is the chain code (hidden part of the extended key; term from BIP-32)
 
 
 ## Implementation 
 
-Generation of keys uses key derivation used by Bitcoin (BIP-32 'Hierarchically Deterministic')[https://bips.xyz/32] wallets.
+Generation of keys uses key derivation used by Bitcoin [BIP-32 'Hierarchically Deterministic'](https://bips.xyz/32) wallets.
 
 Verification operates on public keys only, taking use of the BIP-32 property that a public key derived from the corresponding public key of an extended private key is the same as the one corresponding to the derived private key.
 
@@ -62,7 +62,7 @@ Verification operates on public keys only, taking use of the BIP-32 property tha
 
 This is intended to be run on safe and trusted hardware.
 
-A (BIP-32)[https://bips.xyz/32] seed is generated by any means (probably using BIP-39 words is the best idea).
+A [BIP-32](https://bips.xyz/32) seed is generated by any means (probably using BIP-39 words is the best idea).
 The extended private keys are then derived iteratively:
 
 ```