Chaudhary, Chandan, Alisha Kshetri, Sujay Lal Shrestha, and Kamal Chapagain. 2021. “Design of Home Automation System Using Dual-Tone Multi-Frequency Technique”. Himalayan Journal of Applied Science and Engineering 2 (2):46-53. https://doi.org/10.3126/hijase.v2i2.44116.