1. T h e p h y lo g e n e tic ta x o n o m y o f flow ering p la n ts . hot;Gdn.,1915
2. S tru c tu re -fu n c tio n re la tio n sh ip s in p la n t cy to c h ro m e c;Ite;Phytochem.,1972
3. C rick F . H . C. 1963 T h e re c e n t e x c ite m e n t in th e co d in g p ro b lem . Progr. nucl. acid Res. 1 163- 217.
4. C ro n q u ist A. 1968 The evolution and classification offlowering plants. L o n d o n a n d E d in b u r g h : N elson.
5. D ay h o ff M. O. 1969 Atlas of protein sequence and structure vol. 4. M a ry la n d : N a tio n a l B io - m e d ica l R e se a rc h F o u n d a tio n .