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1 research India publications 10 (10): 32609-32626, 2015
2 "http://www.wikipedia.org"
3 "http://www.howstuffworks.com"
4 "http://www.atmel.com"
5 "http://www.alldatasheets.com"
6 Vandana D, "Wireless Sensor Network Based Remote Irrigation Control System And Automation Using Dtmf Code" 34-37, 2011
7 Schenker L, "Pushbutton Calling With A Two- Group Voice-Frequency Code" 39 : 235-255, 1960
8 V.I. Adamchuk, "On The-Go Soil Sensors for Precision Agriculture" 94-96, 2011
9 Justin Cand, "Mobile robotic sensors for perimeter detection and tracking" 46 (46): 3-13, 2007
10 Rohit S, "Dtmf Based Remote Control System" 2380-2383,
11 Sharma R, "Dtmf Based Remote Control System" 2380-2383, 2006
12 P. P. Mahesh, "DTMF Based Agriculture Pump Control" 6 (6): 165-169, 2016
13 Tuljappa L, "Control Of Remote Domestic System Using Dtmf" 69-70, 2009
14 Awab Fakih, "Cell Phone Operated Robotic Car"
15 Lsmail C, "A Remote Controller For Home And Office Appliances By Telephone" 44 (44): 1291-1297, 1998