A study of the pion–nucleon coupling constant based on scattering length and effective range for both pseudovector and pseudoscalar. Journal of Pure and Applied Sciences (Science Forum), [S. l.], v. 22, n. 2, 2026. DOI: 10.70882/p5g5f209. Disponível em: https://atbuscienceforum.com.ng/index.php/jpas/article/view/440. Acesso em: 3 sep. 2026.