Books 

• NCERT Class 12 Biology Lab Manual(Experiment no: 02, Page no: 12 – 13)
• NCERT Class 12 Textbook (Chapter – 01, Page no: 11 – 17)  

Websites 

• https://en.wikipedia.org/wiki/Germination#Self-incompatibility 
• https://unacademy.com/content/neet-ug/study-material/biology/pollen-germination/ 
• https://www.tutorialspoint.com/study-pollen-germination-on-a-slide