求助文献4篇，请大家帮助，谢谢!

jlhua

求助文献4篇，请能帮助，谢谢!
( u/ G1 w2 h. K; {3 R) R1 Science 25 February 2000:# V5 C( A  G2 `, N6 r: C- g$ S
Vol. 287. no. 5457, pp. 1489 - 1493& ^! V3 K2 h4 _, b: O
Regulation of Cell Fate Decision of Undifferentiated Spermatogonia by GDNF : w  ~6 c/ U, }& Y
2 GDNF Maintains Mouse Spermatogonial Stem Cells In Vivo and In Vitro
5 M7 e! O. Y, K/ L1 l! C丛书 Methods in Molecular Biology 0 p9 U* ?1 C5 a6 H( B) H4 L
ISSN 1064-3745 (Print) 1940-6029 (Online)
9 w2 |7 V8 O2 n9 l2 q" Z卷 Volume 450 ( \0 X! L$ o* t+ q; J" n3 d% v
图书 Germline Stem Cells
6 Y: s! \) |* ~+ E3 e% @+ x出版社 Humana Press   U, h* p% {; }; w
DOI 10.1007/978-1-60327-214-8 8 o% N! o/ p8 {
版权 2008 ) [$ W' H5 x1 t
ISBN 978-1-60327-213-1 (Print) 978-1-60327-214-8 (Online)
, e* f7 W. b  N, {部  I
+ U% k+ D4 G# k4 A$ oDOI 10.1007/978-1-60327-214-8_9
  s3 _' p' Z9 g* g, J3 Spermatogonial Culture Medium: An Effective and Efficient Nutrient Mixture for Culturing Rat Spermatogonial Stem Cells. 0 L5 @, U% l+ ?- V( s" V0 s$ \
Z. Wu, I. Falciatori, L. A. Molyneux, T. E. Richardson, K. M. Chapman, and F. K. Hamra (2009)
' }# Y. o' J9 q! V0 z$ G; z% j3 QBiol Reprod 81, 77-86 1 B/ T1 F- x  h$ w" O6 T) `3 z
|  Abstract »  |  Full Text »  |  PDF » % c7 U# U) R. `" R
4 Wnt signaling promotes proliferation and stemness regulation of spermatogonial stem/progenitor cells. 6 ]$ ?$ [6 D. U* A
N. Golestaneh, E. Beauchamp, S. Fallen, M. Kokkinaki, A. Uren, and M. Dym (2009)
- P# s! Q) _& |3 ~. F5 Q" qReproduction 138, 151-162
0 J& v* \' J) k0 z$ K" l8 \ 请各位能帮忙！衷心感谢！