diff --git a/README.md b/README.md
index 5cc8cf6f..1de09ae7 100644
--- a/README.md
+++ b/README.md
@@ -121,6 +121,6 @@ make all
 
 ## 参考
 
-- [Titanix](https://gitlab.eduxiji.net/202318123101314/oskernel2023-Titanix)
-- [MankorOS](https://gitlab.eduxiji.net/MankorOS/OSKernel2023-MankorOS)
+- [Titanix](https://gitlab.eduxiji.net/202318123101314/oskernel2023-Titanix) 启动流程、内存模块设计
+- [MankorOS](https://gitlab.eduxiji.net/MankorOS/OSKernel2023-MankorOS) RangeMap、UserPtr、设备驱动模块
 - [FTL OS](https://gitlab.eduxiji.net/DarkAngelEX/oskernel2022-ftlos)
diff --git a/crates/async-utils/src/lib.rs b/crates/async-utils/src/lib.rs
index 9b169327..104177d9 100644
--- a/crates/async-utils/src/lib.rs
+++ b/crates/async-utils/src/lib.rs
@@ -1,3 +1,5 @@
+//! Adapted from Titanix
+
 #![no_std]
 #![no_main]
 
diff --git a/crates/range-map/src/lib.rs b/crates/range-map/src/lib.rs
index 2a40069b..84daa91e 100644
--- a/crates/range-map/src/lib.rs
+++ b/crates/range-map/src/lib.rs
@@ -1,3 +1,5 @@
+//! Adapted from MankorOS
+
 #![no_std]
 #![no_main]
 #![feature(map_try_insert)]
diff --git a/driver/src/cpu.rs b/driver/src/cpu.rs
index 289a9c14..bdd777bd 100644
--- a/driver/src/cpu.rs
+++ b/driver/src/cpu.rs
@@ -1,4 +1,6 @@
 //! CPU is also a device
+//!
+//! Adapted from MankorOS
 
 use alloc::vec::Vec;
 
diff --git a/driver/src/manager.rs b/driver/src/manager.rs
index 71494a93..3dda3808 100644
--- a/driver/src/manager.rs
+++ b/driver/src/manager.rs
@@ -1,10 +1,12 @@
 //! Device manager
+//!
+//! Adapted from MankorOS
 
 use alloc::{collections::BTreeMap, sync::Arc, vec::Vec};
 
 use arch::interrupts::{disable_interrupt, enable_external_interrupt};
 use config::{board, mm::K_SEG_DTB_BEG};
-use device_core::{Device, DevId};
+use device_core::{DevId, Device};
 use log::{info, warn};
 
 use crate::{cpu::CPU, plic::PLIC, println};
diff --git a/driver/src/plic.rs b/driver/src/plic.rs
index d9b5124a..57497bc3 100644
--- a/driver/src/plic.rs
+++ b/driver/src/plic.rs
@@ -1,5 +1,7 @@
 //! RISC-V Platform Level Interrupt Controller
 //!
+//! Adapted from MankorOS
+//!
 //! Controller setup helper
 
 use config::mm::VIRT_RAM_OFFSET;
diff --git a/driver/src/serial/mod.rs b/driver/src/serial/mod.rs
index dcaf8d34..7cdd2e38 100644
--- a/driver/src/serial/mod.rs
+++ b/driver/src/serial/mod.rs
@@ -1,3 +1,5 @@
+//! Adapted from MankorOS
+
 pub mod uart8250;
 
 use alloc::{boxed::Box, collections::VecDeque, string::ToString, sync::Arc};
diff --git a/driver/src/serial/uart8250.rs b/driver/src/serial/uart8250.rs
index 8064df32..2631ab14 100644
--- a/driver/src/serial/uart8250.rs
+++ b/driver/src/serial/uart8250.rs
@@ -1,4 +1,7 @@
 //! Copyright (c) 2023 Easton Man
+//!
+//! Adapted from MankorOS
+//!
 //! Adapted from https://docs.rs/uart_16550/latest/src/uart_16550/mmio.rs.html
 
 use core::fmt::Write;
diff --git a/kernel/src/main.rs b/kernel/src/main.rs
index 71c0f562..6d61f013 100644
--- a/kernel/src/main.rs
+++ b/kernel/src/main.rs
@@ -1,3 +1,5 @@
+//! Boot process is adapted from Titanix
+
 #![no_std]
 #![no_main]
 #![feature(alloc_error_handler)]
diff --git a/kernel/src/mm/memory_space/mod.rs b/kernel/src/mm/memory_space/mod.rs
index 85a96161..a2264749 100644
--- a/kernel/src/mm/memory_space/mod.rs
+++ b/kernel/src/mm/memory_space/mod.rs
@@ -46,7 +46,7 @@ pub struct MemorySpace {
     /// Map of `VmArea`s in this memory space.
     /// NOTE: stores range that is lazy allocated
     areas: SyncUnsafeCell<RangeMap<VirtAddr, VmArea>>,
-    /// Pointes to leader task.
+    /// Points to leader task.
     task: Option<Weak<Task>>,
 }
 
diff --git a/kernel/src/mm/user_ptr.rs b/kernel/src/mm/user_ptr.rs
index 90a54394..912bd9be 100644
--- a/kernel/src/mm/user_ptr.rs
+++ b/kernel/src/mm/user_ptr.rs
@@ -1,5 +1,7 @@
 //! # UserPtr
 //!
+//! Adapted from MankorOS
+//!
 //! Used for automatically check user ptr when reading or writing.
 
 use alloc::{string::String, sync::Arc, vec::Vec};
diff --git a/modules/executor/src/lib.rs b/modules/executor/src/lib.rs
index 3f4c96be..f225144d 100644
--- a/modules/executor/src/lib.rs
+++ b/modules/executor/src/lib.rs
@@ -1,3 +1,5 @@
+//! Adapted from Titanix
+
 #![no_std]
 #![no_main]
 
diff --git a/modules/ext4/src/disk.rs b/modules/ext4/src/disk.rs
index 430ce517..64f51b26 100644
--- a/modules/ext4/src/disk.rs
+++ b/modules/ext4/src/disk.rs
@@ -1,3 +1,5 @@
+//! Adapted from StarryOS
+
 use alloc::sync::Arc;
 
 use config::board::BLOCK_SIZE;
diff --git a/modules/sync/src/lib.rs b/modules/sync/src/lib.rs
index 5992bb48..3ccaf68e 100644
--- a/modules/sync/src/lib.rs
+++ b/modules/sync/src/lib.rs
@@ -1,3 +1,5 @@
+//! Adapted from Titanix
+
 #![no_std]
 #![no_main]
 #![feature(negative_impls)]