Judith A. Beecher/ Judith A. Penna/ Marvin L. Bittinger
(16)
Marvin L. Bittinger/ Judith A. Beecher/ David J. Ellenbogen/ Judith A. Penna
(10)
Judith A. Beecher/ Judith A. Penna/ Barbara L. Johnson/ Marvin L. Bittinger
(6)
Eduardo Oliveira Penna de Carvalho
(4)
Marvin L. Bittinger/ Judith A. Beecher/ David J. Ellenbogen/ Judith Penna
(3)
Marvin L. Bittinger/ Judith A. Penna
(2)
;Suprasanna, Penna,Kumar, Vinay (Jawaharlal Nehru Uni, India),Srivastava, Ashish Kumar (Banaras Hindu University, Varanasi, India)
(1)