T. Chaichana, V. Laohakosol and A. Harnchoowong, Ruban continued fraction in fields of positive characteristic, Proc. Int. Conf. Algebra Appl., Chulalongkorn Univ., Bangkok, March 18-22, 2002, 143-148.

V. Laohakosol, T. Chaichana and Y. Yodphothong, An estimate on the number of rationals whose partial quotients are bounded, Contribution in General Algebra (NCAM 2003-2004), 41-43, ed. By N.V. Sanh and N. Pabhapote. A special volume published by East-West J. Math., Bangkok, 2004.

T. Chaichana and V. Laohakosol, Linear independence of continued fractions in the field of formal series over a finite field, Proc. Int. Conf. Math. Appl. (ICMA-MU 2005), 15-17 December 2005, Bangkok, Thailand, 175-184.

V. Laohakosol, P. Riyapan and T. Chaichana, Explicit construction of continued fractions whose partial denominators consist of two copies of an arithmetic progression, Proc. Int. Conf. Math. Appl. (ICMA-MU 2005), 15-17 December 2005, Bangkok, Thailand, 267-278. A special volume published by East-West J. Math., Bangkok, 2006.

P. Riyapan, V. Laohakosol and T. Chaiahana, Two types of explicit continued fractions, Period. Math. Hungar. 52 (2006), 51-72.

T. Chaichana, V. Laohakosol and A. Harnchoowong, Linear independence of continued fractions in the field of formal series over a finite field, Thai J. Math. 4 (2006), 163-177.

T. Chaichana and V. Laohakosol, Independence of continued fractions in the field of Laurent series, Period. Math. Hungar. 55 (2007), 35-59.

V. Laohakosol and T. Chaichana, Characterizing rational elements by two continued fractions in the prime-adic function field, Proc. Int. Conf. Discrete Math. Appl. (ICDMA 2008), 5-7 March 2008, Bangkok, Thailand, 45-52. A special volume published by East-West J. Math., Bangkok, 2008.

T. Chaichana and V. Laohakosol, Zaremba’s conjecture in the field of formal series over a finite base field, In Lee See Keong and Hailiza Kamarul (eds) 5th Asian Mathematical Conference Proceedings (Volume I), June 2009, pp. 460-464. ISBN: 978-967-5417-53-5.

O. Panprasitwech, V. Laohakosol, and T. Chaichana, Linear fractional transformations of continued fractions with bounded partial quotients in the field of formal series, East-West J. Math. 11:2 (2009), 185-194.

V. Laohakosol, T. Chaichana, N. Rompurk Kanasri and J. Rattanamoong, Engel series and Cohen-Egyptian fraction expansions, to appear in International Journal of Mathematics and Mathematical Sciences.

T. Chaichana, T. Komatsu and V. Laohakosol, Liouville numbers in the non-archimedean case, to appear in Publicationes Mathematicae Debrecen.