TY - BOOK AU - Todorov I T TI - Analytic properties of feynman diagrams in quantum field theory T2 - International series of monographs in natural philosophy; 38 U1 - CN01, L13;1 PY - 1973/// CY - New York PB - Pergamon Press KW - Physics KW - Quantum field theory N1 - Appendix 134-137p ER -