Sreedhar (1998). "China Becoming A Superpower and India's Options". Across the Himalayan Gap: An Indian Quest for Understanding China (Ed. Tan Chung). Indira Gandhi National Centre for the Arts, New Delhi. Diakses tanggal 2006-12-01.
Envis Team (2006-06-04). "Ecodestination of India-Sikkim Chapter"(PDF). Eco-destinations of India. The Environmental Information System (ENVIS), Ministry of Environment and Forest, Government of India. hlm. 43. Diarsipkan dari versi asli(PDF) tanggal 2007-06-19. Diakses tanggal 2006-12-01.
Envis Team (2006-06-04). "Ecodestination of India-Sikkim Chapter"(PDF). Eco-destinations of India. The Environmental Information System (ENVIS), Ministry of Environment and Forest, Government of India. hlm. 33. Diarsipkan dari versi asli(PDF) tanggal 2007-06-19. Diakses tanggal 2006-12-01.
Envis Team (2006-06-04). "Ecodestination of India-Sikkim Chapter"(PDF). Eco-destinations of India. The Environmental Information System (ENVIS), Ministry of Environment and Forest, Government of India. hlm. 114. Diarsipkan dari versi asli(PDF) tanggal 2007-06-19. Diakses tanggal 2006-12-01.
Envis Team (2006-06-04). "Ecodestination of India-Sikkim Chapter"(PDF). Eco-destinations of India. The Environmental Information System (ENVIS), Ministry of Environment and Forest, Government of India. Diarsipkan dari versi asli(PDF) tanggal 2007-06-19. Diakses tanggal 2006-12-01.
Envis Team (2006-06-04). "Ecodestination of India-Sikkim Chapter"(PDF). Eco-destinations of India. The Environmental Information System (ENVIS), Ministry of Environment and Forest, Government of India. hlm. 44. Diarsipkan dari versi asli(PDF) tanggal 2007-06-19. Diakses tanggal 2006-12-01.
Envis Team (2006-06-04). "Ecodestination of India-Sikkim Chapter"(PDF). Eco-destinations of India. The Environmental Information System (ENVIS), Ministry of Environment and Forest, Government of India. hlm. 45. Diarsipkan dari versi asli(PDF) tanggal 2007-06-19. Diakses tanggal 2006-12-01.
sikenvis.nic.in
Envis Team (2006-06-30). "Vol-IV Water Environment"(PDF). Carrying Capacity Study of Teesta Basin in Sikkim. The Environmental Information System (ENVIS), Ministry of Environment and Forest, Government of India. hlm. 30–31. Diarsipkan dari versi asli(PDF) tanggal 2007-06-19. Diakses tanggal 2007-02-16.
Envis Team (2006-06-04). "Ecodestination of India-Sikkim Chapter"(PDF). Eco-destinations of India. The Environmental Information System (ENVIS), Ministry of Environment and Forest, Government of India. hlm. 43. Diarsipkan dari versi asli(PDF) tanggal 2007-06-19. Diakses tanggal 2006-12-01.
Envis Team (2006-06-30). "Vol-IV Water Environment"(PDF). Carrying Capacity Study of Teesta Basin in Sikkim. The Environmental Information System (ENVIS), Ministry of Environment and Forest, Government of India. hlm. 30–31. Diarsipkan dari versi asli(PDF) tanggal 2007-06-19. Diakses tanggal 2007-02-16.
Envis Team (2006-06-04). "Ecodestination of India-Sikkim Chapter"(PDF). Eco-destinations of India. The Environmental Information System (ENVIS), Ministry of Environment and Forest, Government of India. hlm. 33. Diarsipkan dari versi asli(PDF) tanggal 2007-06-19. Diakses tanggal 2006-12-01.
Envis Team (2006-06-04). "Ecodestination of India-Sikkim Chapter"(PDF). Eco-destinations of India. The Environmental Information System (ENVIS), Ministry of Environment and Forest, Government of India. hlm. 114. Diarsipkan dari versi asli(PDF) tanggal 2007-06-19. Diakses tanggal 2006-12-01.
Envis Team (2006-06-04). "Ecodestination of India-Sikkim Chapter"(PDF). Eco-destinations of India. The Environmental Information System (ENVIS), Ministry of Environment and Forest, Government of India. Diarsipkan dari versi asli(PDF) tanggal 2007-06-19. Diakses tanggal 2006-12-01.
Envis Team (2006-06-04). "Ecodestination of India-Sikkim Chapter"(PDF). Eco-destinations of India. The Environmental Information System (ENVIS), Ministry of Environment and Forest, Government of India. hlm. 44. Diarsipkan dari versi asli(PDF) tanggal 2007-06-19. Diakses tanggal 2006-12-01.
Envis Team (2006-06-04). "Ecodestination of India-Sikkim Chapter"(PDF). Eco-destinations of India. The Environmental Information System (ENVIS), Ministry of Environment and Forest, Government of India. hlm. 45. Diarsipkan dari versi asli(PDF) tanggal 2007-06-19. Diakses tanggal 2006-12-01.