diff --git a/src/roadmaps/software-design-architecture/content/102-object-oriented-programming/100-primary-principles/102-abstraction.md b/src/roadmaps/software-design-architecture/content/102-object-oriented-programming/100-primary-principles/102-abstraction.md
index a1357f8c4..3a6f31db9 100644
--- a/src/roadmaps/software-design-architecture/content/102-object-oriented-programming/100-primary-principles/102-abstraction.md
+++ b/src/roadmaps/software-design-architecture/content/102-object-oriented-programming/100-primary-principles/102-abstraction.md
@@ -9,5 +9,4 @@ There are two types of abstraction:
 
 Learn more from the following links:
 
-- [What is Abstraction?](Abstraction)
 - [Tutorial - Abstraction](https://www.youtube.com/watch?v=OF55HZPE7lQ)
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diff --git a/src/roadmaps/software-design-architecture/content/108-enterprise-patterns/101-identity-maps.md b/src/roadmaps/software-design-architecture/content/108-enterprise-patterns/101-identity-maps.md
index 7279d74c2..39cb22ffc 100644
--- a/src/roadmaps/software-design-architecture/content/108-enterprise-patterns/101-identity-maps.md
+++ b/src/roadmaps/software-design-architecture/content/108-enterprise-patterns/101-identity-maps.md
@@ -7,4 +7,4 @@ The identity map pattern is typically used in conjunction with an ORM (Object-Re
 Learn more from the following links:
 
 - [Overview of Identity map pattern](https://en.wikipedia.org/wiki/Identity_map_pattern)
-- [Tutorial - Identity Map Design Pattern](youtube.com/watch?v=erDxkIyNudY)
\ No newline at end of file
+- [Tutorial - Identity Map Design Pattern](https://youtube.com/watch?v=erDxkIyNudY)
\ No newline at end of file
diff --git a/src/roadmaps/typescript/content/113-modules/100-namespaces.md b/src/roadmaps/typescript/content/113-modules/100-namespaces.md
index 9ade61083..f6e372722 100644
--- a/src/roadmaps/typescript/content/113-modules/100-namespaces.md
+++ b/src/roadmaps/typescript/content/113-modules/100-namespaces.md
@@ -23,4 +23,4 @@ Learn more from the following resources:
 
 - [Overview of Namespaces](https://www.typescriptlang.org/docs/handbook/namespaces.html)
 - [Namespaces and Modules](https://www.typescriptlang.org/docs/handbook/namespaces-and-modules.html)
-- [TypeScript - Using Namespaces](typescriptlang.org/docs/handbook/namespaces-and-modules.html#using-namespaces)
\ No newline at end of file
+- [TypeScript - Using Namespaces](https://typescriptlang.org/docs/handbook/namespaces-and-modules.html#using-namespaces)
\ No newline at end of file