1 Masahiro, M, "Pollination of crops with bumblebee colonies in Japan" 21 : 17-25, 2000
2 Minitab incorporated company, "Minitab user's guide," Minitab inc. 2000
3 van den Eijnde, "Method for rearing Bombus terrestris continuously and the production of bumblebee colonies for pollination purposes" 154-158, 1991
4 Free, "Insect pollination of crops" Academic Press 684-, 1993
5 Mah Y. I, "Indoor-rearing method of Korean native bumblebee, Bombus ignitus" 2002
6 Yoon H. J, "Facilitating effect of helpers on oviposition and colony development of bumblebee queen, Bombus ignitus" 41 : 239-245, 2002
7 Appl, "Effect of different narcosis procedures on initiating oviposition of prediapausing Bombus terrestris L" 273-279, 1994
8 Yoon H. J, "Effect of CO2-treatment on oviposition and colony development of the bumblebee, Bombus ignitus" 42 : 139-144, 2003
9 Yoon H. J, "Ecological characteristics of Bombus ignitus Smith in Korea" 38 : 101-107, 1999
10 de Ruijter A., "Commercial bumblebee rearing and its implications." 437 : 261-269, 1997
1 Masahiro, M, "Pollination of crops with bumblebee colonies in Japan" 21 : 17-25, 2000
2 Minitab incorporated company, "Minitab user's guide," Minitab inc. 2000
3 van den Eijnde, "Method for rearing Bombus terrestris continuously and the production of bumblebee colonies for pollination purposes" 154-158, 1991
4 Free, "Insect pollination of crops" Academic Press 684-, 1993
5 Mah Y. I, "Indoor-rearing method of Korean native bumblebee, Bombus ignitus" 2002
6 Yoon H. J, "Facilitating effect of helpers on oviposition and colony development of bumblebee queen, Bombus ignitus" 41 : 239-245, 2002
7 Appl, "Effect of different narcosis procedures on initiating oviposition of prediapausing Bombus terrestris L" 273-279, 1994
8 Yoon H. J, "Effect of CO2-treatment on oviposition and colony development of the bumblebee, Bombus ignitus" 42 : 139-144, 2003
9 Yoon H. J, "Ecological characteristics of Bombus ignitus Smith in Korea" 38 : 101-107, 1999
10 de Ruijter A., "Commercial bumblebee rearing and its implications." 437 : 261-269, 1997
11 Yoon H.J, "Colony developmental characteristics of the bumblebee, Bombus ignitus. by the first oviposition day" 8 : 139-143, 2004
12 Ono M, "Breeding of bumblebees-utilization of biological resources" 36 : 328-332, 1999